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A068604 Number of distinct coefficients in expansion related to enumeration of permutations of length n by length of longest subsequence. 0
1, 1, 2, 3, 6, 9, 16, 29, 55 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

REFERENCES

J. M. Hammersley, A few seedings of research, in Proc. Sixth Berkeley Sympos. Math. Stat. and Prob., ed. L. M. le Cam et al., Univ. Calif. Press, 1972, Vol. I, pp. 345-394.

LINKS

Table of n, a(n) for n=1..9.

CROSSREFS

Sequence in context: A017915 A114702 A026768 * A174023 A014868 A029463

Adjacent sequences:  A068601 A068602 A068603 * A068605 A068606 A068607

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Mar 29 2002

STATUS

approved

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Last modified August 4 17:55 EDT 2021. Contains 346455 sequences. (Running on oeis4.)