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 A097434 #9 Aug 09 2013 15:49:12
%S A097434 5,17,23,47,83,167,227,257,443,563,593,677,1277,1283,1613,1973,2333,
%T A097434 2837,2903,3533,5393,5843,6197,6263,6977,7523,8087,8363,11807,12473,
%U A097434 12893,13463,13907,14537,14717,15077,15263,15377,17093,17327,19913
%N A097434 Value of C in y = x^2 + 5x + C such that y is prime for all x = 0 to 3.
%e A097434 a(2) = 17: y = x^2+5x+17.
%e A097434 If x = 0; y = 0+0+17 = 17, which is prime.
%e A097434 If x = 1; y = 1+5+17 = 23, which is prime.
%e A097434 If x = 2; y = 4+10+17 = 31, which is prime.
%e A097434 If x = 3; y = 9+15+17 = 41, which is prime.
%o A097434 (PARI) isok(n) = {for (x=0, 3, if (! isprime(x^2+5*x+n), return (0));); return (1);} \\ _Michel Marcus_, Aug 09 2013
%K A097434 nonn
%O A097434 1,1
%A A097434 _Ray G. Opao_, Aug 22 2004