A226423 - OEIS

A226423

Number of nondecreasing -n..n vectors of length 2 whose dot product with some lexicographically greater or equal nondecreasing -n..n vector equals 2.

3, 11, 17, 25, 36, 47, 62, 78, 94, 116, 142, 158, 189, 221, 242, 274, 314, 346, 392, 423, 454, 508, 563, 595, 646, 709, 755, 803, 874, 917, 992, 1054, 1105, 1190, 1251, 1298, 1389, 1485, 1546, 1609, 1709, 1772, 1878, 1956, 2017, 2134, 2249, 2313, 2418, 2522

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

OFFSET

1,1

COMMENTS

Row 2 of A226422.

LINKS

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

EXAMPLE

Some solutions for n=3

.-2....0...-3...-3...-3...-2...-1...-2...-2....1...-1...-2...-1...-2....0...-3

..2....2...-2....1....2....1...-1....3....0....1....2...-2....3...-1....1...-1

CROSSREFS