A056666 - OEIS

A056666

Number of equivalence classes of 4-valued Post functions of n variables under action of semi-direct product of symmetric group S_n and complementing group C(n,4).

70, 134355076, 886151997189981695113820646176823296, 2182260405264094580008793131218399434811094697362043192997204611423155311899661247043911272024597983456098936160983083394199640518703547613585747214336

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OFFSET

1,1

REFERENCES

I. Strazdins, On the number of types of l-adic functions (in Russian), Proc. Riga Polytech. Inst. 10, No. 1 (1963), 167-186.

LINKS

Table of n, a(n) for n=1..4.

M. A. Harrison and R. G. High, On the cycle index of a product of permutation groups, J. Combin. Theory, 4 (1968), 277-299. See p. 296.

CROSSREFS

Cf. A000616, A001321, A001323, A001324.

Sequence in context: A066789 A103165 A116276 * A172680 A121338 A172776

Adjacent sequences: A056663 A056664 A056665 * A056667 A056668 A056669

KEYWORD

nonn

AUTHOR

Vladeta Jovovic, Aug 09 2000

STATUS

approved