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 A107157 #18 Feb 09 2017 16:24:07 %S A107157 59,131,281,491,499,571,619,641,739,809,811,881,929,1259,1289,1291, %T A107157 1571,1721,1801,1889,1979,2089,2131,2161,2339,2459,2531,2659,2801, %U A107157 2851,3169,3209,3259,3299,3449,3539,3851,3929,3931,4019,4049,4051 %N A107157 Primes of the form x^2 + 50y^2. %C A107157 Discriminant = -200. See A107132 for more information. %H A107157 Vincenzo Librandi and Ray Chandler, <a href="/A107157/b107157.txt">Table of n, a(n) for n = 1..10000</a> [First 1000 terms from Vincenzo Librandi] %H A107157 N. J. A. Sloane et al., <a href="https://oeis.org/wiki/Binary_Quadratic_Forms_and_OEIS">Binary Quadratic Forms and OEIS</a> (Index to related sequences, programs, references) %t A107157 QuadPrimes2[1, 0, 50, 10000] (* see A106856 *) %o A107157 (PARI) list(lim)=my(v=List(),w,t); for(x=1, sqrtint(lim\1), w=x^2; for(y=1, sqrtint((lim-w)\50), if(isprime(t=w+50*y^2), listput(v,t)))); Set(v) \\ _Charles R Greathouse IV_, Feb 09 2017 %K A107157 nonn,easy %O A107157 1,1 %A A107157 _T. D. Noe_, May 13 2005