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 A104227 #6 Jan 04 2020 19:25:18 %S A104227 19,31,67,79,127,139,151,199,211,307,547,619,739,751,919,1087,1231, %T A104227 1459,1471,1759,1987,2131,2179,2239,2251,2467,2647,2851,2971,3319, %U A104227 3331,3391,3499,3511,3559,3571,3727,3739,4027,4567,4759,5107,5347,5419,5431,6367,6607,6619,7027,7219,7459 %N A104227 Primes one less than the sum over a sexy prime pair. %C A104227 Primes of the form A023201(i)+A046117(i)-1 or of the form 2*A087695(j)-1. %H A104227 Harvey P. Dale, <a href="/A104227/b104227.txt">Table of n, a(n) for n = 1..1000</a> %e A104227 19=7+13-1 is a prime and one less than the sum 7+13 over the second sexy prime pair. %t A104227 Select[2#+5&/@Select[Prime[Range[600]],PrimeQ[#+6]&],PrimeQ] (* _Harvey P. Dale_, Jan 04 2020 *) %Y A104227 Cf. A023201, A046117, A104228, A104229. %K A104227 easy,nonn %O A104227 1,1 %A A104227 _Giovanni Teofilatto_, Apr 02 2005 %E A104227 Corrected definition. Extended beyond a(7). - _R. J. Mathar_, Nov 26 2008