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 A128279 #2 Jul 12 2012 00:39:49 %S A128279 15,21,35,39,51,65,95,155,221,329,371,485,519,611,905,989,1121,1199, %T A128279 1469,1509,1541,1661,1821,3039,3189,3431,3641,3791,4055,4109,4281, %U A128279 4601,4859,5079,5111,5195,5331,5429,5579,5951,5979,6161,6245,6731,6881,7415 %N A128279 an=n-th smallest integer of the form m=p1*p2 where pi are odd primes such that d+2m/d are all primes for d dividing 2m. %e A128279 E.g. 35=5.7, 2.5.7+1=71, 2.5+7=17, 2.7+5=19. 5.7+2=37 are all primes and this is the 3rd such number, so a(3)=35 %Y A128279 Cf. A128276, A128277, A128278, A045536. %K A128279 nonn %O A128279 1,1 %A A128279 Kok Seng Chua (chuakokseng(AT)hotmail.com), Mar 05 2007