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 A137592 #9 Oct 12 2013 16:00:23
%S A137592 1,2,48,34560,1393459200,5056584744960000,2422112183371431936000000,
%T A137592 211155601241022491077587763200000000,
%U A137592 4417964278440225627098723475313498521600000000000
%N A137592 Duplicate of A098694.
%C A137592 Hankel transform of A112934(n+1). [From _Paul Barry_, Dec 04 2009]
%F A137592 a(n)=Product{k=0..n, (2(k+1)(2k+1))^(n-k)}; a(n)=A000178(n)*A057863(n)*A006125(n+1)=A121835(n)*A006125(n+1);
%F A137592 G.f.: G(0)/2, where G(k)= 1 + 1/(1 - 1/(1 + 1/(2*k+2)!/x/G(k+1))); (continued fraction). - _Sergei N. Gladkovskii_, Jun 14 2013
%K A137592 dead
%O A137592 0,2
%A A137592 _Paul Barry_, Jan 28 2008