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 A034039 #9 Jul 08 2025 20:04:16 %S A034039 1,2,11,14,22,23,28,37,43,46,53,58,71,74,77,79,86,106,107,109,116,127, %T A034039 134,137,142,149,151,154,158,161,163,193,197,203,211,214,218,226,233, %U A034039 239,253,254,259,263,268,274,281,298,301,302,317,319,322 %N A034039 Numbers that are primitively but not imprimitively represented by (x^2+xy+2y^2, x>=0, y>=0). %Y A034039 Cf. A034035-A034042. %K A034039 nonn %O A034039 1,2 %A A034039 _N. J. A. Sloane_ %E A034039 Definition corrected by _N. J. A. Sloane_, Apr 30 2015