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A226412 Number of nondecreasing -n..n vectors of length 4 whose dot product with some nondecreasing -n..n vector equals 4 1

%I #4 Jun 06 2013 07:04:29

%S 5,67,192,479,963,1709,2893,4633,6895,10079,14273,19437,26217,34565,

%T 44183,56485,71133,87649,107907,131199,156957,187941,223227,261361,

%U 305927,356437,410419,473007,542575,615417,700027,792759,890017,1001073

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

%C Row 4 of A226410

%H R. H. Hardin, <a href="/A226412/b226412.txt">Table of n, a(n) for n = 1..43</a>

%e Some solutions for n=3

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

%e ..1....0...-2...-2....2....0...-1...-2....0....0...-1...-1....1...-2....1...-2

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Jun 06 2013

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Last modified July 16 10:51 EDT 2024. Contains 374345 sequences. (Running on oeis4.)