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 A233532 #5 Dec 14 2013 19:35:29 %S A233532 1,2,3,8,38,268,2578,31672,475120,8427696,172607454,4008441848, %T A233532 104061288740,2985810416824,93812980749076,3202899902480872, %U A233532 118054380417848192,4671653916923940952,197528462484409468792,8886812830338447522120,423862241146246310158108,21362480654281867734050272 %N A233532 Second column of triangle A233530. %Y A233532 Cf. A233530, A233531, A233533, A233534, A233535. %K A233532 nonn %O A233532 1,2 %A A233532 _Paul D. Hanna_, Dec 14 2013