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 A237267 #17 Feb 23 2014 09:59:57 %S A237267 1,2,5,105,585,1041,1590,3582,5460,19425,21450,21540,33495,42315, %T A237267 101745,122265,151710,176190,252525,267435,318780,343800,464100, %U A237267 542640,868140,996765,1080450,1217370,1322685,1461495,1477875,1601985,2523675,2792790,3512145 %N A237267 The positions of records in A236747. %C A237267 Smallest k such that A236747(k) = n: 1, 2, 5, 105, 585, 1041, 1590, 3582, 6870, 5460,... %C A237267 Smallest prime p such that A236747(p) = n: 2, 5, 593, 1889, 4457,... %Y A237267 Cf. A236747 (number of 0 <= k <= sqrt(n) such that n-k and n+k are both prime). %K A237267 nonn %O A237267 1,2 %A A237267 _Antti Karttunen_ and _Juri-Stepan Gerasimov_, Feb 05 2014 %E A237267 a(7)-a(9) from _Michel Marcus_, Feb 05 2014. %E A237267 a(9)-a(35) from _Giovanni Resta_, Feb 09 2014