A003322 Necklace permutations.

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

Offset: 1

Author

N. J. A. Sloane

Keywords

• nonn
• more
• nice

References

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

Links

• 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.

Extensions

Corrected and extended by Don Knuth, Nov 15 1995