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 A020673 #9 Jun 08 2014 15:26:28 %S A020673 0,1,4,9,10,11,14,16,19,25,26,35,36,40,41,44,46,49,56,59,64,65,74,76, %T A020673 81,89,90,91,94,99,100,104,106,110,115,121,126,131,139,140,144,154, %U A020673 160,161,164,169,171,176,179,184,185,190,196,206,209,211,224,225,234,235,236,241 %N A020673 Numbers of form x^2 + 10 y^2. %H A020673 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 A020673 Primes: A033201. %K A020673 easy,nonn %O A020673 1,3 %A A020673 _David W. Wilson_