A226341 - OEIS

%I #9 Mar 23 2024 17:31:22

%S 3,14,22,34,50,66,90,114,138,170,210,234,282,330,362,410,474,522,594,

%T 642,690,770,858,906,986,1082,1154,1226,1338,1402,1522,1618,1698,1826,

%U 1922,1994,2138,2282,2378,2474,2634,2730,2898,3018,3114,3290,3474,3570,3738

%N Number of nondecreasing -n..n vectors of length 2 whose dot product with some other -n..n vector equals 2.

%H R. H. Hardin, <a href="/A226341/b226341.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=3:

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

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

%Y Row 2 of A226340.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jun 04 2013