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 A144040 Shifts left when Euler transform applied 8 times. 1
 0, 1, 1, 9, 53, 401, 2967, 23659, 192615, 1613687, 13769538, 119419761, 1049154071, 9318828138, 83541286988, 754920397795, 6869170162829, 62884110339333, 578768613062948, 5352307127138701, 49708821972158231, 463445557084360740 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,4 LINKS N. J. A. Sloane, Transforms MAPLE 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); CROSSREFS 8th column of A144042. Sequence in context: A038761 A003698 A001688 * A052108 A209453 A224484 Adjacent sequences:  A144037 A144038 A144039 * A144041 A144042 A144043 KEYWORD eigen,nonn AUTHOR Alois P. Heinz, Sep 07 2008 STATUS approved

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Last modified May 22 08:07 EDT 2013. Contains 225512 sequences.