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 A243168 #14 Jun 03 2022 15:40:11 %S A243168 0,1,4,9,13,16,24,25,33,36,37,49,52,61,64,69,73,81,88,96,97,100,109, %T A243168 117,121,132,141,144,148,157,169,177,181,184,193,196,208,213,216,225, %U A243168 229,241,244,249,253,256,276,277,289,292,297,312,313,321,324,325,333,337,349,352,361,373,376,384,388,393,397,400,409,421,429,433,436,441,457,468,472 %N A243168 Nonnegative integers of the form x^2 + 6xy - 3y^2. %C A243168 Discriminant 48. %C A243168 Also nonnegative integers of the form 4x^2 - 3y^2. - _Jon E. Schoenfield_, Jun 03 2022 %H A243168 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 A243168 Primes in this sequence = A068228. Cf. A085018, A244291. %K A243168 nonn %O A243168 1,3 %A A243168 _N. J. A. Sloane_, Jun 01 2014