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 A159602 #2 Mar 30 2012 18:37:17
%S A159602 1,1,2,6,26,152,1202,12840,184060,3552960,92338448,3237738008,
%T A159602 153574021372,9872941474544,862850471831896,102720981260693424,
%U A159602 16701084112350547436,3715705202756433837504,1133547354784950481434016
%N A159602 G.f.: A(x) = Sum_{n>=0} log(1 + x/(1-2^n*x))^n/n!.
%e A159602 G.f.: A(x) = 1 + x + 2*x^2 + 6*x^3 + 26*x^4 + 152*x^5 +...
%e A159602 A(x) = Sum_{n>=0} log(1 + x + 2^n*x^2 + 4^n*x^3 + 8^n*x^4 +..)^n/n!.
%e A159602 A(x) = 1 + log(1+x/(1-2x)) + log(1+x/(1-4x))^2/2! + log(1+x/(1-8x))^3/3! +...
%o A159602 (PARI) {a(n)=polcoeff(sum(m=0,n,log(1+x/(1-2^m*x+x*O(x^n)))^m/m!),n)}
%K A159602 nonn
%O A159602 0,3
%A A159602 _Paul D. Hanna_, May 08 2009