A056668 Number of equivalence classes of 4-valued Post functions of n variables under action of symmetric group S_n.

256, 2148007936, 56713727820157015040139002378207625216, 558658663747608212482251041591910255311640242524683057405682390247387063055565341158714756695500587176090293978181121308657577535237991794589785900711936

Offset

1,1

References

M. A. Harrison and R. G. High, On the cycle index of a product of permutation groups, J. Combin. Theory, 4 (1968), p. 295.

Links

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

Crossrefs

Cf. A000616, A001321-A001324.

Sequence in context: A017300 A017420 A017552 * A087930 A245490 A185981

Adjacent sequences: A056665 A056666 A056667 * A056669 A056670 A056671

Keyword

nonn

Author

Vladeta Jovovic, Aug 09 2000

Status

approved