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 A226843 #22 Nov 13 2016 17:03:50
%S A226843 2,5,11,23,31,47,59,73,103,109,149,167,179,197,233,269,277,313,347,
%T A226843 353,389,419,449,499,523,547,571,587,607,691,727,761,773,853,859,907,
%U A226843 947,977,1019,1051,1063,1129,1153,1187,1201,1289,1381,1427,1433,1453,1489
%N A226843 a(n) = prime(prime(n + 1) - 2).
%e A226843 a(5) = 31 since the (5 + 1)-th prime is 13, and the (13 - 2)-th prime is 31.
%t A226843 Table[Prime[Prime[n] - 2], {n, 2, 75}] (* _Alonso del Arte_, Jun 21 2013 *)
%o A226843 (PARI) a(n) = prime(prime(n + 1) - 2); \\ _Michel Marcus_, Nov 13 2016
%Y A226843 Cf. A158611, A006450.
%K A226843 nonn
%O A226843 1,1
%A A226843 _Juri-Stepan Gerasimov_, Jun 19 2013