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 A277042 #5 Sep 25 2016 15:55:23 %S A277042 1,1,0,1,0,0,27,0,0,10666,0,0,6174792,0,0 %N A277042 G.f.: A(x) = x/Series_Reversion[x*G(x)] where A(x*G(x)) = G(x) = g.f. of A277041. %e A277042 G.f.: A(x) = 1 + x + x^3 + 27*x^6 + 10666*x^9 + 6174792*x^12 +... %e A277042 such that: A(x*G(x)) = G(x) = g.f. of A277041 where %e A277042 G(x) = 1 + x + x^2 + 2*x^3 + 5*x^4 + 11*x^5 + 51*x^6 + 246*x^7 + 897*x^8 + 13526*x^9 + 115631*x^10 + 614681*x^11 + 8739556*x^12 + 89877217*x^13 + 596072842*x^14 +...+ A277041(n)*x^n +... %Y A277042 Cf. A144692, A277040, A277041, A277043. %K A277042 nonn,more %O A277042 0,7 %A A277042 _Paul D. Hanna_, Sep 25 2016