This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A144822 #8 Sep 17 2014 17:29:26
%S A144822 1,1,10,100,1045,10450,105400,1054000,10549120,105495700,1055051050,
%T A144822 10550510500,105506139100,1055061391000,10550623396000,
%U A144822 105506234900500,1055062444351210,10550624443512100,105506245393982800
%N A144822 Shifts left when Dirichlet convolution with a (DC:(b,a)->c) applied 9 times.
%H A144822 Alois P. Heinz, <a href="/A144822/b144822.txt">Table of n, a(n) for n = 1..500</a>
%H A144822 N. J. A. Sloane, <a href="/transforms.txt">Transforms</a>
%p A144822 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:= proc(n, k) local a, b, t; b[1]:= dc(a,a); for t from 2 to k do b[t]:= dc(b[t-1],a) od: a:= n-> `if`(n=1, 1, b[k](n-1)); a(n) end: a:= n-> A(n,9): seq (a(n), n=1..30);
%Y A144822 9th column of A144823.
%K A144822 eigen,nonn
%O A144822 1,3
%A A144822 _Alois P. Heinz_, Sep 21 2008