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Number of nondecreasing -4..4 vectors of length n whose dot product with some nondecreasing -4..4 vector equals n
0

%I #3 Jun 06 2013 07:00:59

%S 2,34,130,479,1123,2959,6041,12820,23401,43439,73976,125962,199900,

%T 318926,485768,735222,1072033

%N Number of nondecreasing -4..4 vectors of length n whose dot product with some nondecreasing -4..4 vector equals n

%C Column 4 of A226410

%e Some solutions for n=3

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Jun 06 2013