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A283612 Number of sets of sequences of total length n over an alphabet of n letters with the symmetric group acting on the letters. 1
1, 1, 4, 13, 57, 252, 1322, 7361, 45057, 294392, 2054394, 15172872, 118175823, 966300054, 8268640847, 73825951226, 686049132714, 6620780612228, 66224775509130, 685372810735380, 7327272883303533 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,3
REFERENCES
E. Palmer and F. Harary, Graphical Enumeration, Academic Press, 1973.
LINKS
CROSSREFS
Sequence in context: A149479 A149480 A151481 * A039626 A149481 A149482
KEYWORD
nonn,more
AUTHOR
Marko Riedel, Mar 11 2017
STATUS
approved

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Last modified April 23 14:15 EDT 2024. Contains 371914 sequences. (Running on oeis4.)