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 A023675 #9 Dec 17 2021 09:22:46
%S A023675 2,3,6,12,24,5,10,20,60,120,60,120,360,720,7,14,21,42,168,2520,5040,
%T A023675 56,168,168,336,1344,20160,40320,36,72,72,72,144,216,432,504,1512,
%U A023675 181440,362880,60,120,360,720,720,720,1440,1814400,3628800,11
%N A023675 Table of orders of primitive permutation groups by degree.
%D A023675 M. Pohst and H. Zassenhaus, Algorithmic Algebraic Number Theory, Cambridge Univ. Press, 1989. Appendix: Numerical Tables, p. 428.
%D A023675 CRC Handbook of Combinatorial Designs, 1996, pp. 595ff.
%H A023675 <a href="/index/Gre#groups">Index entries for sequences related to groups</a>
%e A023675 {2}, {3,6}, {12,24}, {5,10,20,60,120}, ...
%K A023675 nonn,tabf,nice
%O A023675 2,1
%A A023675 _N. J. A. Sloane_