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 A145869 #4 Jul 22 2025 06:14:14 %S A145869 2,2,4,8,30,16,28,24,114,40,58,48,100,72,92,88 %N A145869 a(n) is the least even positive integer which is not expressible as a sum A145819(s)+A145819(t), if both of s,t differ from n. %Y A145869 A145819 A145812 A145818 %K A145869 nonn %O A145869 1,1 %A A145869 _Vladimir Shevelev_, Oct 22 2008