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 A110156 #3 Mar 30 2012 18:36:49
%S A110156 1,2,8,26,106,350,1512,5110,21476,77886,319148,1141038,4910266,
%T A110156 17499058,72541048,272237050,1121013506,4112829790,17377874692,
%U A110156 63697436318,265450712278,1003409368250,4102752994248,15321419162722,64725434306768
%N A110156 G.f.: A(x) = Product_{n>=1} 1/(1 - 4^n*x^n)^(2/4^n); self-convolution equals A110154.
%e A110156 A(x) = 1 + 2*x + 8*x^2 + 26*x^3 + 106*x^4 + 350*x^5 +... =
%e A110156 1/[(1-4*x)^(2/4)*(1-16*x^2)^(2/16)*(1-64*x^3)^(2/64)*...].
%o A110156 (PARI) a(n)=polcoeff(prod(k=1,n,1/(1-4^k*x^k+x*O(x^n))^(2/4^k)),n)
%Y A110156 Cf. A110152, A110153, A110154, A110155.
%K A110156 nonn
%O A110156 0,2
%A A110156 _Paul D. Hanna_, Jul 14 2005