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 A034027 #11 Jul 08 2025 20:02:47 %S A034027 0,1,3,4,6,9,11,12,16,17,18,24,25,27,33,34,36,38,43,44,48,49,51,54,57, %T A034027 64,66,67,68,72,75,81,82,83,86,89,96,99,100,102,108,113,114,118,121, %U A034027 123,129,131,132,136,139,144,146,147,150,152,153,162,169,171 %N A034027 Numbers of the form x^2+2y^2 with x >= y >= 0. %Y A034027 Cf. A002479. %K A034027 nonn %O A034027 1,3 %A A034027 _N. J. A. Sloane_ %E A034027 Definition corrected by _N. J. A. Sloane_, Apr 30 2015 (thanks to _Harvey P. Dale_ for pointing out that something was wrong).