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Search: id:A156917
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| A156917 |
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General q-Narayana triangle sequence: q=3;m=2; c(n,l,m)=Product[q-binomial(n + k, l + k, m)/q-binomial(n - l + k, k, m), {k, 0, m}] |
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+0 1
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| 1, 1, 1, 1, 40, 1, 1, 1210, 1210, 1, 1, 33880, 1024870, 33880, 1, 1, 925771, 784128037, 784128037, 925771, 1, 1, 25095280, 580812061522, 16262737722616, 580812061522, 25095280, 1, 1, 678468820, 425659125229240, 325671796712891524
(list; table; graph; listen)
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OFFSET
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0,5
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COMMENT
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Row sums are:
{1, 2, 42, 2422, 1092632, 1570107618, 17424412036222, 652194913033179170,
189060566695044668933610, 188602075109681827520528645944,
1459625430842679382287597833052615968 ,...}.
I have made the general Narayana level i equal to the m =q-1 q-combination / Gaussian level,
but that is not necessary.
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FORMULA
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q=3;m=2;
c(n,l,m)=Product[q-binomial(n + k, l + k, m)/q-binomial(n - l + k, k, m), {k, 0, m}]
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EXAMPLE
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{1},
{1, 1},
{1, 40, 1},
{1, 1210, 1210, 1},
{1, 33880, 1024870, 33880, 1},
{1, 925771, 784128037, 784128037, 925771, 1},
{1, 25095280, 580812061522, 16262737722616, 580812061522, 25095280, 1},
{1, 678468820, 425659125229240, 325671796712891524, 325671796712891524, 425659125229240, 678468820, 1},
{1, 18326727760, 310852833944711080, 6447056947633081877440, 176165831094073962301048, 6447056947633081877440, 310852833944711080, 18326727760, 1},
{1, 494894285941, 226744821210507560554, 127139910155209947281116468, 94173897417940882107581360008, 94173897417940882107581360008, 127139910155209947281116468, 226744821210507560554, 494894285941, 1},
{1, 13362799477720, 165329327642475178468363, 2504087254915277031691820226328, 50145960006476009671341554681490292, 1359328502654886873735539664093290560, 50145960006476009671341554681490292, 2504087254915277031691820226328, 165329327642475178468363, 13362799477720, 1}
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MATHEMATICA
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Clear[t, n, m, i, k, c, b];
t[n_, m_] = If[m == 0, n!, Product[Sum[(m + 1)^i, {i, 0, k - 1}], {k, 1, n}]];
b[n_, k_, m_] = If[n == 0, 1, t[n, m]/(t[k, m]*t[n - k, m])]
c[n_, l_, m_] = Product[b[n + k, l + k, m]/b[n - l + k, k, m], {k, 0, m}]
Table[Flatten[Table[Table[c[n, k, m], {k, 0, n}], {n, 0, 10}]], {m, 0, 10}]
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CROSSREFS
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A001263
Sequence in context: A013375 A013419 A013420 this_sequence A078084 A037937 A126652
Adjacent sequences: A156914 A156915 A156916 this_sequence A156918 A156919 A156920
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KEYWORD
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nonn,tabl,uned
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AUTHOR
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Roger L. Bagula (rlbagulatftn(AT)yahoo.com), Feb 18 2009
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