OFFSET
1,2
COMMENTS
Conjecture: partial sums of A115266. - Sean A. Irvine, Jul 14 2022
LINKS
John Stufken and Boxin Tang, Complete enumeration of two-Level orthogonal arrays of strength d with d+2 constraints, arXiv:0708.1908 [math.ST], 2007.
FORMULA
Empirical g.f.: x / ((x-1)^6*(x+1)*(x^2+x+1)^2). - Colin Barker, Aug 01 2013
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Jonathan Vos Post, Aug 15 2007
EXTENSIONS
Name clarified by Andrey Zabolotskiy, Sep 22 2021
STATUS
approved