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 A179433 #2 Mar 30 2012 18:37:22
%S A179433 1,9,405,121500,247203171,3543210805275,373203783345533355,
%T A179433 299059356226224581923626,1870707073035678423776605220985,
%U A179433 93075349691648156957700437094276630105
%N A179433 Column 1 of triangle A179430.
%C A179433 T=A179430 is a triangular matrix where column 0 of T^m equals C(m*3^(n-1), n) at row n for n>=0, m>=0.
%e A179433 G.f.: A(x) = 1 + 9*x + 405*x^2 + 121500*x^3 + 247203171*x^4 +...
%o A179433 (PARI) {a(n)=local(M=matrix(n+2, n+2, r, c, binomial(r*3^(c-2), c-1)), P); P=matrix(n+2, n+2, r, c, binomial((r+1)*3^(c-2), c-1)); (P~*M~^-1)[n+2, 2]}
%Y A179433 Cf. A179430, A179431, A136393, A179432, A179434.
%K A179433 nonn
%O A179433 0,2
%A A179433 _Paul D. Hanna_, Jul 21 2010