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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).
(Formerly M4317 N1809)
1

%I M4317 N1809

%S 6,2862,537157696,37252918396015625,1289303099816839265917858176,

%T 32115447190132359991237336502881651018804,

%U 784637716923335095479473759060307277562325323313332617216,24578381309444114202259488565864018899536000344974197975371115039374528219929

%N 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 M. A. Harrison and R. G. High, On the cycle index of a product of permutation groups, J. Combin. Theory, 4 (1968), 277-299.

%D N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).

%D N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

%K nonn

%O 2,1

%A _N. J. A. Sloane_

%E Definition improved and more terms from _Sean A. Irvine_, Oct 01 2015

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Last modified May 22 17:42 EDT 2022. Contains 353957 sequences. (Running on oeis4.)