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Search: id:A144038
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| A144038 |
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Shifts left when Euler transform applied 6 times. |
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+0
2
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| 0, 1, 1, 7, 34, 209, 1260, 8219, 54677, 374904, 2617996, 18588586, 133708072, 972484206, 7139186644, 52832157095, 393700752053, 2951755132720, 22250074031893, 168524281244364, 1281906305775734, 9788771511218660
(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:=6: 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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6th column of A144042.
Sequence in context: A080048 A027233 A117650 this_sequence A027842 A027683 A000829
Adjacent sequences: A144035 A144036 A144037 this_sequence A144039 A144040 A144041
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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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