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 A271232 #7 Apr 02 2016 13:41:10
%S A271232 24,25,26,27,28,32,33,34,35,36,48,49,50,51,52,54,55,56,57,58,62,63,64,
%T A271232 65,66,74,75,76,77,78,84,85,86,87,88,132,133,134,135,136,152,153,154,
%U A271232 155,156,158,159,160,161,162,168,169,170,171,172,174,175,176,177,178
%N A271232 Composite integers sandwiched between primes p, q with q-p = 6.
%H A271232 Laurent Coppey, <a href="http://www.numdam.org/item?id=DIA_2011__65-66__1_0">Décompositions multiplicatives directes des entiers</a>, Diagrammes, 65-66 (2011), p. 1-68, in French, see J6 p. 11.
%e A271232 The composite number 24 is sandwiched between consecutive primes 23 and 29, and 29-23=6, so 24 is a member of the sequence.
%o A271232 (PARI) lista(nn) = {forcomposite(c=4, nn, if ((p=precprime(c)) && ((nextprime(c)-p)==6), print1(c, ", ")););}
%Y A271232 Cf. A014574, A031924, A031925, A045881, A271211.
%K A271232 nonn
%O A271232 1,1
%A A271232 _Michel Marcus_, Apr 02 2016