login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A056668 Number of equivalence classes of 4-valued Post functions of n variables under action of symmetric group S_n. 0
256, 2148007936, 56713727820157015040139002378207625216, 558658663747608212482251041591910255311640242524683057405682390247387063055565341158714756695500587176090293978181121308657577535237991794589785900711936 (list; graph; refs; listen; history; text; internal format)
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

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified July 28 05:19 EDT 2021. Contains 346317 sequences. (Running on oeis4.)