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Number of nondecreasing -n..n vectors of length 2 whose dot product with some other -n..n vector equals 2.
Row 2 of A226340.
Some solutions for n=3:
. -1... -2.... 2... -2.... 2.... 1.... 1... -3... -3... -2.... 1... -1... -2... -3.... 0... -1
.. 2... -1.... 2.... 2.... 3.... 3.... 2.... 1... -2.... 1.... 1.... 0... -2... -1.... 1.... 3
R. H. Hardin , Jun 04 2013
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R. H. Hardin, <a href="/A226341/b226341.txt">Table of n, a(n) for n = 1..210</a>
allocated for R. H. Hardin
Number of nondecreasing -n..n vectors of length 2 whose dot product with some other -n..n vector equals 2
3, 14, 22, 34, 50, 66, 90, 114, 138, 170, 210, 234, 282, 330, 362, 410, 474, 522, 594, 642, 690, 770, 858, 906, 986, 1082, 1154, 1226, 1338, 1402, 1522, 1618, 1698, 1826, 1922, 1994, 2138, 2282, 2378, 2474, 2634, 2730, 2898, 3018, 3114, 3290, 3474, 3570, 3738
1,1
Row 2 of A226340
Some solutions for n=3
.-1...-2....2...-2....2....1....1...-3...-3...-2....1...-1...-2...-3....0...-1
..2...-1....2....2....3....3....2....1...-2....1....1....0...-2...-1....1....3
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nonn
R. H. Hardin Jun 04 2013
approved
editing
allocated for R. H. Hardin
allocated
approved