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 A320854 #4 Oct 22 2018 12:02:46 %S A320854 1,1,5,17,48,122,276,573,1112,2042,3578,6024,9803,15476,23793,35728, %T A320854 52522,75761,107416,149923,206288,280145,375868,498713,654914,851807, %U A320854 1098032,1403673,1780402,2241738,2803237,3482687,4300406,5279489,6446078,7829696,9463558 %N A320854 Number of 8-element subsets of [n] whose sum is a triangular number. %H A320854 Alois P. Heinz, <a href="/A320854/b320854.txt">Table of n, a(n) for n = 8..1000</a> %Y A320854 Column k=8 of A284249. %Y A320854 Cf. A000217. %K A320854 nonn %O A320854 8,3 %A A320854 _Alois P. Heinz_, Oct 22 2018