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Number of nondecreasing -7..7 vectors of length n whose dot product with some lexicographically greater or equal nondecreasing -7..7 vector equals n
0

%I #3 Jun 06 2013 07:18:33

%S 2,62,431,2394,9546,35451,108478,302135,777184,1900407,4327920,

%T 9528141,19739530

%N Number of nondecreasing -7..7 vectors of length n whose dot product with some lexicographically greater or equal nondecreasing -7..7 vector equals n

%C Column 7 of A226422

%e Some solutions for n=3

%e .-5...-5...-5...-3...-7...-4...-6...-6...-3...-7...-3...-6...-6...-6...-3...-5

%e .-3....0....0....5...-2....2...-6...-1...-3....1....1...-6....1...-5...-2...-3

%e ..5....2....7....5....7....3....5....0....0....7....2....3....3...-2...-2....2

%K nonn

%O 1,1

%A _R. H. Hardin_ Jun 06 2013