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 A322775 #3 Dec 30 2018 23:18:53 %S A322775 1,3,70,4025,431636,75114998,19449364539,7059006496410, %T A322775 3437740821764782,2172596362927904998,1735323511562307096513, %U A322775 1714589657484702134799407,2058734042458059390066278968,2959366820014712815406422598389,5028070020338050558675966002870476 %N A322775 Main diagonal of array in A322770. %Y A322775 Cf. A322770. %K A322775 nonn %O A322775 0,2 %A A322775 _N. J. A. Sloane_, Dec 30 2018