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 A020678 #15 May 22 2015 13:35:10
%S A020678 0,3,5,8,12,17,20,23,27,32,45,47,48,53,57,68,72,75,80,83,92,93,95,107,
%T A020678 108,113,120,125,128,137,147,152,153,155,167,173,180,183,188,192,197,
%U A020678 200,207,212,227,228,233,237,243,245,248,255,257,263,272,288,293,300,305,317
%N A020678 Numbers of form 3 x^2 + 5 y^2.
%C A020678 Discriminant -60.
%H A020678 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 A020678 With[{upto=320},Select[Union[3#[[1]]^2+5#[[2]]^2&/@ Tuples[ Range[ 0, Ceiling[ Sqrt[upto]]],2]],#<+upto&]] (* _Harvey P. Dale_, May 22 2015 *)
%Y A020678 The primes in this sequence are given by A106859 (excluding 2). - _N. J. A. Sloane_, Jun 01 2014
%K A020678 easy,nonn
%O A020678 1,2
%A A020678 _David W. Wilson_