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 A196890 #6 Mar 30 2012 17:37:35 %S A196890 1,1,10,23,72,335,2220,19166,217862,3428059,71688050,1884401480, %T A196890 63363038340,2929516409504,178211319638172,13290584617658383, %U A196890 1240111930777216192,158642776309162956097,26642849845285577276244,5432337767302682299726906 %N A196890 Number of partitions of 3^n into powers of n. %H A196890 Alois P. Heinz, <a href="/A196890/b196890.txt">Table of n, a(n) for n = 0..100</a> %F A196890 a(n) = [x^(3^n)] 1/Product_{j>=0}(1-x^(n^j)) for n>1. %e A196890 a(2) = 10 because there are 10 partitions of 3^2=9 into powers of 2: [1,8], [1,4,4], [1,2,2,4], [1,1,1,2,4], [1,1,1,1,1,4], [1,2,2,2,2], [1,1,1,2,2,2], [1,1,1,1,1,2,2], [1,1,1,1,1,1,1,2], [1,1,1,1,1,1,1,1,1]. %Y A196890 Row n=3 of A196879. %K A196890 nonn %O A196890 0,3 %A A196890 _Alois P. Heinz_, Oct 07 2011