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 A097716 #5 Mar 30 2012 17:35:59 %S A097716 1,-1,2,-17,124,-2764,43688,-1859138,51236656,-3550889296, %T A097716 151107728672,-15494138893232,941930695305664,-133994296272170944, %U A097716 11024086088089751168,-2077570618897716831248,222290021402867410844416,-53603997631397508980982016,7234385689981722178901729792 %N A097716 Left-hand edge of triangle in A097474. %K A097716 sign,easy %O A097716 0,3 %A A097716 _N. J. A. Sloane_, Sep 21 2004 %E A097716 More terms from _Emeric Deutsch_, Dec 24 2004