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Search: id:A065420
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| A065420 |
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Triangle T(n,k) = binomial(n+2,k+1)*(binomial(n+2,k+1)-1), n >=0, 0 <= k <= n. |
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+0
1
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| 2, 6, 6, 12, 30, 12, 20, 90, 90, 20, 30, 210, 380, 210, 30, 42, 420, 1190, 1190, 420, 42, 56, 756, 3080, 4830, 3080, 756, 56, 72, 1260, 6972, 15750, 15750, 6972, 1260, 72, 90, 1980, 14280, 43890, 63252, 43890, 14280, 1980, 90, 110, 2970, 27060, 108570, 212982
(list; table; graph; listen)
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OFFSET
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0,1
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EXAMPLE
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2; 6,6; 12,30,12; 20,90,90,20; ...
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CROSSREFS
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Sequence in context: A053319 A075779 A140880 this_sequence A119312 A051398 A073131
Adjacent sequences: A065417 A065418 A065419 this_sequence A065421 A065422 A065423
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KEYWORD
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nonn,easy,tabl
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AUTHOR
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Gary W. Adamson, Nov 15 2001
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EXTENSIONS
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More terms from Naohiro Nomoto (n_nomoto(AT)yabumi.com), Nov 22 2001
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