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A003322 Necklace permutations.
(Formerly M1282)
2
1, 1, 1, 2, 4, 14, 57, 347, 2375, 20752, 200805, 2293192, 28097136, 381963696, 5651257984, 87997162749, 1478237810536, 26259254617337, 491527066667949, 9640606422165480 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

REFERENCES

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

LINKS

Table of n, a(n) for n=1..20.

H. W. Gould, Letters to N. J. A. Sloane, 1974

D. E. Knuth, Computer science and its relation to mathematics, Amer. Math. Monthly, 81 (1974), 323-343. doi: 10.2307/2318994.

D. E. Knuth, H. Wilf, C. L. Mallows, & D. Klarner, Correspondence, 1994

Index entries for sequences related to necklaces

CROSSREFS

Sequence in context: A030885 A006384 A204198 * A170939 A030952 A030861

Adjacent sequences:  A003319 A003320 A003321 * A003323 A003324 A003325

KEYWORD

nonn,more,nice

AUTHOR

N. J. A. Sloane

EXTENSIONS

Corrected and extended by Don Knuth, Nov 15 1995

STATUS

approved

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Last modified October 20 05:42 EDT 2017. Contains 293601 sequences.