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Number of nondecreasing -6..6 vectors of length n whose dot product with some nonincreasing -6..6 vector equals n
0

%I #3 Jun 06 2013 06:37:50

%S 2,64,344,1646,5272,17812,41428,112060,247684,582700,1099228,2515470,

%T 4309522,8283534,15224294,25736894

%N Number of nondecreasing -6..6 vectors of length n whose dot product with some nonincreasing -6..6 vector equals n

%C Column 6 of A226398

%e Some solutions for n=3

%e .-2...-6...-1...-1...-1...-1...-5...-2...-3...-3...-6...-5...-4...-3...-5...-3

%e ..3...-1...-1....2...-1....3....4....2...-3....1....3....1...-3...-2....3...-2

%e ..5....1....1....6....6....4....6....3...-3....4....6....5....5...-2....6...-1

%K nonn

%O 1,1

%A _R. H. Hardin_ Jun 06 2013