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 A028952 #16 Jul 08 2025 18:57:35 %S A028952 0,3,4,5,9,12,15,16,20,23,25,27,31,33,36,37,44,45,48,55,59,60,64,67, %T A028952 69,71,75,80,81,89,92,93,97,99,100,108,111,113,115,124,125,132,135, %U A028952 137,141,144,147,148,155,157,159,165,176,177,179,180,181,185,188,191,192 %N A028952 Numbers represented by quadratic form with Gram matrix [ 3, 1; 1, 4 ]. %C A028952 Nonnegative integers of the form 3*x^2 + 2*x*y + 4*y^2, discriminant -44. - _Ray Chandler_, Jul 12 2014 %H A028952 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) %Y A028952 Primes: A106282. %K A028952 nonn %O A028952 1,2 %A A028952 _N. J. A. Sloane_ %E A028952 More terms from Larry Reeves (larryr(AT)acm.org), Mar 29 2000