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Search: id:A144039
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| A144039 |
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Shifts left when Euler transform applied 7 times. |
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+0
2
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| 0, 1, 1, 8, 43, 295, 1982, 14379, 106464, 811769, 6304231, 49770106, 398042059, 3218655532, 26269422252, 216121646661, 1790428656802, 14922986525284, 125050910828179, 1052916751167676, 8903502888220215, 75579379572985970
(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:=7: 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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7th column of A144042.
Sequence in context: A034361 A117617 A111365 this_sequence A044110 A044491 A078895
Adjacent sequences: A144036 A144037 A144038 this_sequence A144040 A144041 A144042
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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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