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 A107153 #18 Feb 09 2017 15:01:39 %S A107153 2,23,31,41,73,151,223,239,257,311,449,577,593,599,601,607,647,673, %T A107153 719,823,863,929,967,991,1087,1129,1153,1223,1289,1297,1327,1481,1543, %U A107153 1559,1823,1871,1889,1913,2063,2129,2143,2377,2441,2473,2657,2663 %N A107153 Primes of the form 2x^2 + 23y^2. %C A107153 Discriminant = -184. See A107132 for more information. %H A107153 Vincenzo Librandi and Ray Chandler, <a href="/A107153/b107153.txt">Table of n, a(n) for n = 1..10000</a> [First 1000 terms from Vincenzo Librandi] %H A107153 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 A107153 QuadPrimes2[2, 0, 23, 10000] (* see A106856 *) %o A107153 (PARI) list(lim)=my(v=List(),w,t); for(x=0, sqrtint(lim\2), w=2*x^2; for(y=0, sqrtint((lim-w)\23), if(isprime(t=w+23*y^2), listput(v,t)))); Set(v) \\ _Charles R Greathouse IV_, Feb 09 2017 %K A107153 nonn,easy %O A107153 1,1 %A A107153 _T. D. Noe_, May 13 2005