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 A232246 #3 Nov 21 2013 01:26:25 %S A232246 1,6,60,684,8270,103356,1319318,17089176,223742646,2953453860, %T A232246 39238422432,524028551976,7028512984012,94609733971200, %U A232246 1277433085844250,17293594106959920,234654019904185254,3190395630994096932,43454433346369902968,592805610973385781960 %N A232246 Central terms of triangle A110440. %C A232246 a(n) = A110440(2*n,n). %o A232246 (Haskell) %o A232246 a232246 n = a110440 (2 * n) n %K A232246 nonn %O A232246 0,2 %A A232246 _Reinhard Zumkeller_, Nov 21 2013