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 A332366 #7 Feb 13 2020 00:59:01 %S A332366 3,13,33,73,133,237,381,593,857,1261,1757,2377,3109,4117,5273,6717, %T A332366 8353,10385,12665,15325,18249,21905,25921,30453,35377,41325,47749, %U A332366 54985,62765,71529,80913,91389,102513,115421,129113,144005,159761,177737,196685 %N A332366 Main diagonal of A332365. %Y A332366 Cf. A332365. %K A332366 nonn %O A332366 2,1 %A A332366 _N. J. A. Sloane_, Feb 12 2020