A003322 Necklace permutations. (Formerly M1282)

1, 1, 1, 2, 4, 14, 57, 347, 2375, 20752, 200805, 2293192, 28097136, 381963696, 5651257984, 87997162749, 1478237810536, 26259254617337, 491527066667949, 9640606422165480

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: A006384 A059687 A204198 * A170939 A030952 A030861

Adjacent sequences: A003319 A003320 A003321 * A003323 A003324 A003325

Keyword

nonn,more,nice,changed

Author

N. J. A. Sloane

Extensions

Corrected and extended by Don Knuth, Nov 15 1995

Status

approved