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 A154828 #2 Mar 30 2012 18:59:22 %S A154828 1,2,8,52,548,9852,323988,20589852,2599737428,658007495452, %T A154828 334291709264468,340646270830877852,695599447171017236308, %U A154828 2844303802537519899994652,23277772627131826189210443348 %N A154828 Row sums of a q-Catalan triangle for q=2. %C A154828 Row sums of A154829. Might be considered as q-Schroeder numbers for q=2. %F A154828 G.f.: 1/(1-2x/(1-2x/(1-5x/(1-8x/(1-17x/(1-32x/(1-65x/(1-.... (continued fraction). %K A154828 easy,nonn %O A154828 0,2 %A A154828 _Paul Barry_, Jan 15 2009