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 A243170 #6 Jun 08 2014 11:19:03 %S A243170 0,1,4,9,10,14,16,25,26,29,35,36,40,49,56,61,64,65,74,79,81,90,91,94, %T A243170 100,101,104,116,121,126,131,134,139,140,144,146,160,166,169,179,181, %U A243170 185,191,194,196,199,211,224,225,234,235,244,250,251,256,259,260,261,269,274,289,290,296,311,315,316,324,326,329,334,335,350,360,361,364,365 %N A243170 Nonnegative integers of the form 4x^2+xy-4y^2. %C A243170 Discriminant 65. %H A243170 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) %Y A243170 Primes in this sequence = A141111. %K A243170 nonn %O A243170 1,3 %A A243170 _N. J. A. Sloane_, Jun 01 2014