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 A253054 #5 Jan 01 2015 12:23:48 %S A253054 329,427,581,679,973,1043,1141,1267,1337,1673,1897,1981,2653,2723, %T A253054 2863,3199,3227,3493,3563,3787,3983,4207,4319,4529,4571,4711,4837, %U A253054 4963,5299,5747,5971,6209,6559,6769,7133,7343,7763,8197,8309,8561,8603,8981,9037,9107 %N A253054 If, for some m, A098550(m-2) is a prime p and A098550(m) = 7p, add 7p to the sequence. %C A253054 A subsequence of A251544 (and of course of A098550). %Y A253054 Cf. A098550, A251544, A253052, A253053. %K A253054 nonn %O A253054 1,1 %A A253054 _N. J. A. Sloane_, Jan 01 2015