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 A059730 #9 Oct 04 2022 16:09:38 %S A059730 1,4,41,1682,346493,428611842,3711778551721,257155729841782602, %T A059730 160344312228246705825061,999795050381098913077708678362, %U A059730 68574254851594531153034763076600504945,56440708711718407654211348073962227066902939026 %N A059730 Third diagonal of A059922. %H A059730 Reinhard Zumkeller, <a href="/A059730/b059730.txt">Table of n, a(n) for n = 3..28</a> %o A059730 (Haskell) see entry in A059922. %K A059730 nonn %O A059730 3,2 %A A059730 _N. J. A. Sloane_, Feb 09 2001