A226341 - OEIS

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A226341

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

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

EXAMPLE

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

CROSSREFS

Row 2 of A226340.

Sequence in context: A300216 A258218 A255219 * A024473 A024598 A019001

Adjacent sequences: A226338 A226339 A226340 * A226342 A226343 A226344

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jun 04 2013

STATUS

approved