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.
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
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Jan 11 2002
STATUS
approved