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 A143989 #4 Mar 30 2012 18:51:00 %S A143989 2,4,5,8,9,13,15,16,22,24,26,31,36,37,40,46,49,50,55,61,70,74,76,81, %T A143989 82,94,99,100,106,115,120,127,133,136,142,144,145,154,159,166,170,178, %U A143989 184,202,205,219,221,225,235,246,250,253,256,265,268,274,295,298,301,310 %N A143989 Numbers having a unique representation as a sum of a prime and a square. %C A143989 A002471(a(n)) = 1; subsequence of A014089. %H A143989 R. Zumkeller, <a href="/A143989/b143989.txt">Table of n, a(n) for n = 1..256</a> %K A143989 nonn %O A143989 1,1 %A A143989 _Reinhard Zumkeller_, Sep 07 2008