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 A045822 #6 Mar 08 2020 22:52:22 %S A045822 1,12,62,184,373,644,1110,1768,2482,3452,4768,6056,7815,10296,12294, %T A045822 14816,18736,21648,25246,30728,34362,39780,47702,52176,59113,68696, %U A045822 74318,83960,95952,102356 %N A045822 a(n) = A045820(n)/2. %K A045822 nonn %O A045822 0,2 %A A045822 _N. J. A. Sloane_