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 A107211 #18 Feb 10 2017 16:19:45 %S A107211 2,47,79,97,431,439,521,761,769,929,1193,1223,1297,1303,1399,1481, %T A107211 1567,1753,1823,1847,2143,2311,2503,2591,2633,2753,2857,3089,3271, %U A107211 3361,3623,3761,3767,3919,4007,4049,4217,4481,4703,5407,5503,5689 %N A107211 Primes of the form 2x^2 + 47y^2. %C A107211 Discriminant = -376. See A107132 for more information. %H A107211 Vincenzo Librandi and Ray Chandler, <a href="/A107211/b107211.txt">Table of n, a(n) for n = 1..10000</a> [First 1000 terms from Vincenzo Librandi] %H A107211 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 A107211 QuadPrimes2[2, 0, 47, 10000] (* see A106856 *) %o A107211 (PARI) list(lim)=my(v=List(),w,t); for(x=0, sqrtint(lim\2), w=2*x^2; for(y=0, sqrtint((lim-w)\47), if(isprime(t=w+47*y^2), listput(v,t)))); Set(v) \\ _Charles R Greathouse IV_, Feb 10 2017 %K A107211 nonn,easy %O A107211 1,1 %A A107211 _T. D. Noe_, May 13 2005