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A226411 Number of nondecreasing -n..n vectors of length 3 whose dot product with some nondecreasing -n..n vector equals 3. 1

%I #9 Mar 23 2024 17:30:57

%S 4,23,74,130,240,358,566,766,1112,1408,1916,2362,3066,3656,4564,5348,

%T 6544,7522,9014,10184,11966,13430,15602,17366,19820,21858,24814,27150,

%U 30580,33202,37118,40226,44656,48144,52814,56696,62264,66626,72796,77444

%N Number of nondecreasing -n..n vectors of length 3 whose dot product with some nondecreasing -n..n vector equals 3.

%H R. H. Hardin, <a href="/A226411/b226411.txt">Table of n, a(n) for n = 1..127</a>

%e Some solutions for n=3:

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

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

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

%Y Row 3 of A226410.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jun 06 2013

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Last modified June 24 19:44 EDT 2024. Contains 373690 sequences. (Running on oeis4.)