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 A014089 #11 Jul 08 2025 02:52:21 %S A014089 2,3,4,5,6,7,8,9,11,12,13,14,15,16,17,18,19,20,21,22,23,24,26,27,28, %T A014089 29,30,31,32,33,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52, %U A014089 53,54,55,56,57,59,60,61,62 %N A014089 Sum of a square and a prime. %C A014089 A002471(a(n))>0; complement of A014090; A143989 is a subsequence. [From _Reinhard Zumkeller_, Sep 07 2008] %o A014089 (PARI) isok(n) = for (i = 0, sqrtint(n), if (isprime(n - i^2), return (1))); 0 \\ _Michel Marcus_, Sep 04 2013 %Y A014089 Cf. A058654. %K A014089 nonn,easy %O A014089 1,1 %A A014089 _N. J. A. Sloane_