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 A112708 #5 Nov 17 2022 19:26:50
%S A112708 1,2,2,3,4,-7,68,-285,553,8052,-142982,1505079,-11345907,38452956,
%T A112708 672559916,-18995038455,301298528898,-3473588012773,23630888402370,
%U A112708 167786255489085,-10244305495490866,242112502660674867,-4105880426369854764,48839647963108358039
%N A112708 Row sums of triangle A112707 (partial sums of Catalan numbers multiplied by powers of negative numbers).
%F A112708 a(n) = Sum_{m=0..n} A112707(n, m), n>=0.
%Y A112708 Cf. A112707, A112709 (unsigned row sums).
%K A112708 sign,easy
%O A112708 0,2
%A A112708 _Wolfdieter Lang_, Oct 31 2005