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 A107150 #18 Feb 09 2017 14:53:44 %S A107150 53,257,269,397,401,421,617,757,773,929,1021,1109,1181,1237,1433,1609, %T A107150 1621,1697,1753,1873,2069,2113,2237,2381,2621,2729,2777,2797,2897, %U A107150 2953,3041,3257,3433,3613,3677,3701,3733,3793,3853,3877,4013,4093 %N A107150 Primes of the form x^2 + 44y^2. %C A107150 Discriminant = -176. See A107132 for more information. %H A107150 Vincenzo Librandi and Ray Chandler, <a href="/A107150/b107150.txt">Table of n, a(n) for n = 1..10000</a> [First 1000 terms from Vincenzo Librandi] %H A107150 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 A107150 QuadPrimes2[1, 0, 44, 10000] (* see A106856 *) %o A107150 (PARI) list(lim)=my(v=List(),w,t); for(x=1, sqrtint(lim\1), w=x^2; for(y=0, sqrtint((lim-w)\44), if(isprime(t=w+44*y^2), listput(v,t)))); Set(v) \\ _Charles R Greathouse IV_, Feb 09 2017 %K A107150 nonn,easy %O A107150 1,1 %A A107150 _T. D. Noe_, May 13 2005