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A036837 Schoenheim bound L_1(n,n-5,n-6). 3
4, 11, 25, 50, 92, 158, 257, 400, 600, 873, 1237, 1713, 2325, 3100, 4069, 5266, 6729, 8500, 10625, 13155, 16145, 19655, 23750, 28500, 33981, 40274, 47466, 55650, 64925, 75397, 87178, 100387, 115150, 131600, 149878, 170132, 192518 (list; graph; refs; listen; history; text; internal format)
OFFSET

7,1

COMMENTS

Mathar observes that this sequence is possibly the same as A215052. - Peter Bala, Mar 29 2014

REFERENCES

W. H. Mills and R. C. Mullin, Coverings and packings, pp. 371-399 of Jeffrey H. Dinitz and D. R. Stinson, editors, Contemporary Design Theory, Wiley, 1992. See Eq. 1.

LINKS

Table of n, a(n) for n=7..43.

Index entries for covering numbers

FORMULA

Conjecture: G.f.: x^7*(4-x^9+5*x^8-10*x^7+10*x^6-5*x^5+2*x^4-5*x^3+10*x^2-9*x) / ((x^4+x^3+x^2+x+1)*(x-1)^6). - Maksym Voznyy (voznyy(AT)mail.ru), Jul 28 2009

CROSSREFS

A column of A036838. A215052.

Sequence in context: A290876 A333643 A006522 * A215052 A011851 A193912

Adjacent sequences:  A036834 A036835 A036836 * A036838 A036839 A036840

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Jan 11 2002

STATUS

approved

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Last modified September 26 01:25 EDT 2020. Contains 337346 sequences. (Running on oeis4.)