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 A178119 #7 Jan 11 2015 01:25:55 %S A178119 1,2,5,16,64,308,1727,11008,78244,611060,5184338,47366320,462782080, %T A178119 4807659368,52853722811,612426360832,7453621425532,94997205901940, %U A178119 1264555335831662,17540102647480336,252979919852470672 %N A178119 Expansion of 1/(1-2x-x^2/(1-4x-3x^2/(1-6x-5x^2/(1-8x-7x^2/(1-...))))) (continued fraction). %C A178119 Hankel transform is A057863. First column of A178121. %F A178119 G.f.: 1/(Q(0)-x) where Q(k) = 1 - x*(2*k+1)/( 1 - x/Q(k+1) ); (continued fraction ). - _Sergei N. Gladkovskii_, Mar 22 2013 %e A178119 G.f. = 1 + 2*x + 5*x^2 + 16*x^3 + 64*x^4 + 308*x^5 + 1727*x^6 + 11008*x^7 + ... %K A178119 easy,nonn %O A178119 0,2 %A A178119 _Paul Barry_, May 20 2010