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Search: id:A144040
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| A144040 |
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Shifts left when Euler transform applied 8 times. |
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+0
2
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| 0, 1, 1, 9, 53, 401, 2967, 23659, 192615, 1613687, 13769538, 119419761, 1049154071, 9318828138, 83541286988, 754920397795, 6869170162829, 62884110339333, 578768613062948, 5352307127138701, 49708821972158231, 463445557084360740
(list; graph; listen)
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OFFSET
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0,4
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LINKS
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N. J. A. Sloane, Transforms
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MAPLE
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k:=8: with (numtheory): etr:= proc(p) local b; b:=proc(n) option remember; local d, j; if n=0 then 1 else add (add (d*p(d), d=divisors(j)) *b(n-j), j=1..n)/n fi end end: a:='a': b[1]:=etr(a): for t from 2 to k do b[t]:= etr(b[t-1]) od: a:= n-> `if`(n<2, n, b[k](n-1)): seq (a(n), n=0..30);
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CROSSREFS
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8th column of A144042.
Sequence in context: A038761 A003698 A001688 this_sequence A052108 A093846 A152994
Adjacent sequences: A144037 A144038 A144039 this_sequence A144041 A144042 A144043
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KEYWORD
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eigen,nonn
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AUTHOR
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Alois P. Heinz (heinz(AT)hs-heilbronn.de), Sep 07 2008
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