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 A077160 #2 Dec 05 2013 19:55:49 %S A077160 2,1,4,9,6,17,10,21,28,51,30,55,64,87,88,105,78,167,102,171,152,195, %T A077160 180,253,264,315,280,351,270,427,348,465,434,587,474,595,480,681,680, %U A077160 741,666,835,738,915,914,957,860,1127,940,1197,1106,1215,1092,1417,1272 %N A077160 Leading terms of rows of triangle in A077159. %Y A077160 Cf. A077159, A077161, A077162. %K A077160 easy,nonn %O A077160 1,1 %A A077160 _Amarnath Murthy_, Oct 31 2002 %E A077160 More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Apr 23 2003