login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A053731 a(n) = ceiling(binomial(n,8)/n). 4
0, 0, 0, 0, 0, 0, 0, 1, 1, 5, 15, 42, 99, 215, 429, 805, 1430, 2431, 3978, 6299, 9690, 14535, 21318, 30645, 43263, 60088, 82225, 111004, 148005, 195098, 254475, 328697, 420732, 534006, 672452, 840565, 1043460, 1286934, 1577532, 1922618 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,10
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, 8)/n), n=1..45); # G. C. Greubel, Sep 06 2019
MATHEMATICA
Table[Ceiling[Binomial[n, 8]/n], {n, 45}] (* G. C. Greubel, Sep 06 2019 *)
PROG
(PARI) vector(45, n, ceil(binomial(n, 8)/n)) \\ G. C. Greubel, Sep 06 2019
(Magma) [Ceiling(Binomial(n, 8)/n): n in [1..45]]; // G. C. Greubel, Sep 06 2019
(Sage) [ceil(binomial(n, 8)/n) for n in (1..45)] # 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), this sequence (k=8), A053733 (k=9).
Sequence in context: A288414 A102620 A211380 * A111295 A200760 A032193
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Mar 25 2000
STATUS
approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified March 28 20:05 EDT 2024. Contains 371254 sequences. (Running on oeis4.)