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 A004145 M4881 #12 Oct 24 2023 20:29:59 %S A004145 0,12,1360,350000,255036992,571462430224 %N A004145 Number of degenerate simplices in n-cube. %D A004145 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence). %H A004145 B. L. Ratkoe, <a href="http://dx.doi.org/10.2307/2320303">How many degenerate simplices are generated by n+1 vertices of the unit n-cube?</a>, Amer. Math. Monthly, 86 (1979), 49. %Y A004145 Column 0 of A268408. %K A004145 nonn %O A004145 2,2 %A A004145 _N. J. A. Sloane_