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 A375544 #5 Aug 31 2024 23:29:14
%S A375544 0,1,-1,4,-4,9,-5,12,-12,17,-15,24,-16,29,-17,32,-32,37,-35,44,-38,53,
%T A375544 -43,60,-44,65,-47,72,-48,77,-49,80,-80,85,-83,92,-86,101,-91,108,-94,
%U A375544 117,-101,128,-106,137,-111,144,-112,149,-115,156,-118,165,-123,172
%N A375544 a(n) = Sum_{1..n+1} (-1)^(n-k) A375825(n, k).
%Y A375544 Cf. A375825.
%K A375544 sign
%O A375544 0,4
%A A375544 _Peter Luschny_, Aug 31 2024