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 A332368 #10 Feb 13 2020 08:27:44 %S A332368 1,5,13,31,57,107,173,275,401,599,837,1143,1497,1995,2565,3279,4081, %T A332368 5091,6213,7535,8985,10803,12789,15047,17489,20451,23645,27251,31113, %U A332368 35487,40149,45371,50913,57351,64173,71607,79449,88419,97869 %N A332368 Main diagonal of A332367, divided by 4. %H A332368 N. J. A. Sloane, <a href="/A332371/a332371.pdf">Illustration for a(3) = 20/4 = 5</a> %Y A332368 Cf. A332367. %K A332368 nonn %O A332368 2,2 %A A332368 _N. J. A. Sloane_, Feb 12 2020