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%I #4 Mar 30 2012 17:37:28
%S 1,1,256,65536,16809856,4303323136,1101667434496,282026863230976,
%T 72198881268083456,18482913606768459776,4731625884430073102336,
%U 1211296226414098714198016,310091833962291289108054016
%N Shifts left when Dirichlet convolution (DC:(b,b)->a) applied 8 times.
%H N. J. A. Sloane, <a href="/transforms.txt">Transforms</a>
%p k:=8: with (numtheory): dc:= proc(b,c) proc(n) option remember; add (b(d) *c(n/d), d=`if`(n<0,{}, divisors(n))) end end: a:='a': b[1]:= dc(a,a): for t from 2 to k do b[t]:= dc(b[t-1], b[t-1]) od: a:= n-> `if`(n=1, 1, b[k](n-1)): seq (a(n), n=1..20);
%Y 8th column of A144324.
%K eigen,nonn
%O 1,3
%A _Alois P. Heinz_, Sep 17 2008