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A053733 a(n) = ceiling(binomial(n,9)/n). 3
0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 5, 19, 55, 143, 334, 715, 1430, 2702, 4862, 8398, 13997, 22610, 35530, 54480, 81719, 120175, 173587, 246675, 345345, 476905, 650325, 876525, 1168700, 1542684, 2017356, 2615092, 3362260, 4289780, 5433722 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,11
LINKS
R. L. Graham and N. J. A. Sloane, Lower bounds for constant weight codes, IEEE Trans. Inform. Theory, 26 (1980), 37-43.
MAPLE
seq(ceil(binomial(n, 9)/n), n=1..40); # G. C. Greubel, Sep 06 2019
MATHEMATICA
Table[Ceiling[Binomial[n, 9]/n], {n, 40}] (* G. C. Greubel, Sep 06 2019 *)
PROG
(PARI) vector(40, n, ceil(binomial(n, 9)/n)) \\ G. C. Greubel, Sep 06 2019
(Magma) [Ceiling(Binomial(n, 9)/n): n in [1..40]]; // G. C. Greubel, Sep 06 2019
(Sage) [ceil(binomial(n, 9)/n) for n in (1..40)] # G. C. Greubel, Sep 06 2019
CROSSREFS
Cf. Sequences of the form ceiling(binomial(n,k)/n): A000012 (k=1), A004526 (k=2), A007997 (k=3), A008646 (k=5), A032192 (k=7), A053618 (k=4), A053643 (k=6), A053731 (k=8), this sequence (k=9).
Sequence in context: A209817 A281156 A060100 * A032194 A024532 A036421
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Mar 25 2000
STATUS
approved

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Last modified June 15 10:19 EDT 2024. Contains 373407 sequences. (Running on oeis4.)