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 A107215 #18 Feb 10 2017 16:22:13 %S A107215 107,179,401,617,827,883,907,1051,1171,1187,1481,1619,1723,1913,2251, %T A107215 2297,2417,2459,2531,2657,2699,2731,3089,3347,3529,3539,3593,3691, %U A107215 3697,3889,3907,4057,4153,4363,4603,4817,5051,5107,5153,5209,5531 %N A107215 Primes of the form x^2 + 98y^2. %C A107215 Discriminant = -392. See A107132 for more information. %H A107215 Vincenzo Librandi and Ray Chandler, <a href="/A107215/b107215.txt">Table of n, a(n) for n = 1..10000</a> [First 1000 terms from Vincenzo Librandi] %H A107215 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 A107215 QuadPrimes2[1, 0, 98, 10000] (* see A106856 *) %o A107215 (PARI) list(lim)=my(v=List(),w,t); for(x=1, sqrtint(lim\1), w=x^2; for(y=1, sqrtint((lim-w)\98), if(isprime(t=w+98*y^2), listput(v,t)))); Set(v) \\ _Charles R Greathouse IV_, Feb 10 2017 %K A107215 nonn,easy %O A107215 1,1 %A A107215 _T. D. Noe_, May 13 2005