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 A202945 #12 Jan 09 2013 04:02:13 %S A202945 1,2,100,800,152100,2737800,1156000000,36992000000,27619018944400, %T A202945 1380950947220000,1606635342973440000,115677744694087680000, %U A202945 193495923191341225000000,18962600472751440050000000 %N A202945 v(n+1)/v(n), where v=A203773. %C A202945 See A093883 for a discussion and guide to related sequences. %t A202945 f[j_] := Floor[j/2]; z = 20; %t A202945 u := Product[f[j]^2 + f[k]^2, {j, 1, k - 1}] %t A202945 v[n_] := Product[u, {k, 2, n}] %t A202945 Table[v[n], {n, 1, z}] (* A203773 *) %t A202945 Table[v[n + 1]/v[n], {n, 1, z}] (* A202945 *) %t A202945 Table[Sqrt[v[n + 1]/v[n]], {n, 1, z}] %t A202945 Table[Sqrt[v[2 n]/v[2 n - 1]], {n, 1, z}] (* A203774 *) %t A202945 Table[Sqrt[v[2 n + 1]/(2 v[2 n])], %t A202945 {n, 1, z}] (* A203775 *) %t A202945 %/%% (* A000027 *) %K A202945 nonn %O A202945 1,2 %A A202945 _Clark Kimberling_, Jan 05 2012