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 A046106 #4 Mar 30 2012 16:48:22 %S A046106 1,0,8,4,48,68,284,684,1816,5608,12684,42068,92916,304100,688988, %T A046106 2170020,5088784,15436172,37281880,109786204,271062388,781016892, %U A046106 1958863988,5555714820,14090644980,39503105472,101000072900,280693435596 %N A046106 G.f.: g.f. for A001411 / g.f. for A004018. %e A046106 1 + 4*q + 12*q^2 + 36*q^3 + 100*q^4 + 284*q^5 + 780*q^6 + 2172*q^7 + 5916*q^8 + 16268*q^9 + ... / 1 + 4*q + 4*q^2 + 4*q^4 + 8*q^5 + 4*q^8 + 4*q^9 + ... = 1 + 8*q^2 + 4*q^3 + 48*q^4 + 68*q^5 + 284*q^6 + 684*q^7 + 1816*q^8 + 5608*q^9 + ... %Y A046106 Cf. A001411, A004018. %K A046106 nonn %O A046106 0,3 %A A046106 _N. J. A. Sloane_, based on a suggestion of Maurice Craig (Maurice.D.Craig(AT)BHPBilliton.com), May 11 2003