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Number of nondecreasing -5..5 vectors of length n whose dot product with some nonincreasing -5..5 vector equals n
0

%I #3 Jun 06 2013 06:36:52

%S 2,48,224,912,2674,6900,15614,37804,74606,163304,286196,557084,887602,

%T 1518950,2861206,4438472

%N Number of nondecreasing -5..5 vectors of length n whose dot product with some nonincreasing -5..5 vector equals n

%C Column 5 of A226398

%e Some solutions for n=3

%e .-1....4...-1...-5...-3...-4...-5...-5...-1...-4...-2...-5....0...-4....3....0

%e .-1....4....3...-2....4....2...-4...-1...-1....0...-2...-5....1...-1....4....2

%e .-1....5....3....0....5....3...-2....4....1....5....3....2....4....2....4....5

%K nonn

%O 1,1

%A _R. H. Hardin_ Jun 06 2013