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 A029718 #16 Jun 10 2021 11:49:24 %S A029718 0,2,3,7,8,10,12,15,18,23,27,28,32,35,40,42,43,47,48,50,58,60,63,67, %T A029718 72,75,82,83,87,90,92,98,103,107,108,112,115,122,123,127,128,135,138, %U A029718 140,147,160,162,163,167,168,172,175,178,183,188,192,200,202,203,207,210 %N A029718 Numbers of form 2x^2 + 2xy + 3y^2. %C A029718 Numbers represented by quadratic form with Gram matrix [ 2, 1; 1, 3 ]. %D A029718 H. Cohn, A second course in number theory, John Wiley & Sons, Inc., New York-London, 1962. see page 3. %H A029718 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) %F A029718 List contains 0 and all positive n such that 2*A035170(n) = A028586(n) is nonzero. - _Michael Somos_, Oct 21 2006 %Y A029718 Cf. A028927. %Y A029718 For primes see A106865. %Y A029718 For the properly represented numbers see A344232. %K A029718 nonn %O A029718 1,2 %A A029718 _N. J. A. Sloane_ %E A029718 More terms from Larry Reeves (larryr(AT)acm.org), Mar 29 2000