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 A084864 #7 Dec 13 2021 08:04:59
%S A084864 5,11,14,20,21,29,30,35,44,45,50,53,56,59,62,66,75,77,80,83,84,93,98,
%T A084864 99,101,107,110,116,120,125,126,131,140,146,147,149,155,158,165,173,
%U A084864 174,176,179,180,189,194,197,200,203,206,210,212,219,224,227,236,237
%N A084864 Numbers that can be written in the form 2*u^2 + 3*v^2, u*v>0.
%C A084864 A084863(a(n)) > 0; for primes see A084865, A084866.
%H A084864 Jean-François Alcover, <a href="/A084864/b084864.txt">Table of n, a(n) for n = 1..10000</a>
%e A084864 30 = 18 + 12 = 2*3^2 + 3*2^2, therefore 30 is a term.
%t A084864 wmax = 240;
%t A084864 Table[w = 2 u^2 + 3 v^2; If[w <= wmax, w, Nothing], {u, 1, Sqrt[wmax/2] // Ceiling}, {v, 1, Sqrt[wmax/3] // Ceiling}] // Flatten // Union (* _Jean-François Alcover_, Dec 13 2021 *)
%K A084864 nonn
%O A084864 1,1
%A A084864 _Reinhard Zumkeller_, Jun 10 2003