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 A060428 #1 May 16 2003 03:00:00 %S A060428 1,3,4,7,9,12,13,16,19,21,25,27,28,31,36,37,39,43,48,49,49,52,57,61, %T A060428 63,64,67,73,75,76,79,81,84,91,91,93,97,100,103,108,109,111,112,117, %U A060428 121,124,127,129,133,133,139,144,147,147,148,151,156,157,163,169,169,171 %N A060428 Numbers of form x^2 + xy + y^2 (with repetitions if more than one representation is possible). %Y A060428 See A003136, which is the main entry for these numbers. %K A060428 nonn %O A060428 1,2 %A A060428 Anton Sherwood (bronto(AT)pobox.com), Apr 05 2001