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 A134282 #6 Sep 25 2024 09:47:01
%S A134282 1,5,61,959,20821,545279,17128201,620355263,25594230937,1181868481463,
%T A134282 60478614651577,3395069184089687,207524762064350473,
%U A134282 13718967902774331287,975392219493426602569,74215525935813198093815
%N A134282 Alternating row sums of triangle A134280 (S2(6)').
%F A134282 a(n) = Sum_{m=1..n} A134280(n,m)*(-1)^(m-1), n>=1.
%Y A134282 Cf. A134281 (row sums of triangle A134280).
%K A134282 nonn,easy
%O A134282 1,2
%A A134282 _Wolfdieter Lang_, Nov 13 2007