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 A001326 M4317 N1809 #22 May 19 2024 12:45:54 %S A001326 6,2862,537157696,37252918396015625,1289303099816839265917858176, %T A001326 32115447190132359991237336502881651018804, %U A001326 784637716923335095479473759060307277562325323313332617216,24578381309444114202259488565864018899536000344974197975371115039374528219929 %N A001326 Number of equivalence classes of n-valued Post functions of 2 variables under action of semi-direct product of symmetric group S_2 and complementing group D(2,n). %D A001326 N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence). %D A001326 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence). %H A001326 M. A. Harrison and R. G. High, <a href="https://doi.org/10.1016/S0021-9800(68)80008-0">On the cycle index of a product of permutation groups</a>, J. Combin. Theory, 4 (1968), 277-299. %K A001326 nonn %O A001326 2,1 %A A001326 _N. J. A. Sloane_ %E A001326 Definition improved and more terms from _Sean A. Irvine_, Oct 01 2015