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 A308516 #15 Apr 07 2020 01:10:16 %S A308516 85,91,771,1255,1351,21679 %N A308516 Odd numbers which are not squares and cannot be written as a sum of a prime and a square. %C A308516 The sequence is probably finite. a(7) > 2000000 (if it exists). %C A308516 a(7) > 1.5*10^11, if it exists. - _Giovanni Resta_, Jul 16 2019 %Y A308516 A subsequence of A020495. %Y A308516 Cf. A014090, A065377. %K A308516 nonn,more %O A308516 1,1 %A A308516 _Daniel Starodubtsev_, Jun 03 2019