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 A211239 #6 Oct 29 2013 11:59:48 %S A211239 180078317,1278189947,1829187287,5862143447,6369321857,7226006861, %T A211239 12412643261,50626299797,53039299211,72355485857,74621287901, %U A211239 76233413141,81948881447,115826556611,129077263697,137168442221,137376420947,146539105871,168759510737,181122284501 %N A211239 Prime numbers p such that x^2 + x + p produces primes for x = 0..10 but not x = 11. %C A211239 The first term is A164926(11). %H A211239 Zak Seidov, <a href="/A211239/b211239.txt">Table of n, a(n) for n = 1..31</a> %Y A211239 Cf. A067774, A164926. %K A211239 nonn %O A211239 1,1 %A A211239 _T. D. Noe_, Apr 09 2012