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 A155766 #5 Dec 25 2016 00:52:13 %S A155766 2,3,7,5,23,19,19,47,43,13,107,211,37,101,73,31,191,199,103,239,271, %T A155766 107,569,313,179,281,397,109,491,463,191,857,919,113,503,283,491,1619, %U A155766 523,199,659,691,223,821,1321,241,1307,1627,293,1373,1621,751,2399,823,499 %N A155766 Least prime p such that p + 2n is prime, but not both p+2k and p+2(n-k) are prime for 0 < k < n. %C A155766 Does a(n) exist for all n? It appears that a(3n) is less than a(3n-1) and a(3n+1) for all n except 2 and 12. %H A155766 T. D. Noe, <a href="/A155766/b155766.txt">Table of n, a(n) for n = 0..2000</a> %F A155766 a(n) = A103147(n) - n = A155767(n) - 2n. %K A155766 nonn %O A155766 0,1 %A A155766 _T. D. Noe_, Jan 27 2009