A222643 - OEIS

A222643

Number of nX2 0..2 arrays with no more than floor(nX2/2) elements unequal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..2 order

1, 1, 3, 12, 38, 124, 430, 1530, 5378, 18938, 67042, 238446, 849586, 3033214, 10851386, 38895414, 139634834, 502003486, 1807104810, 6512929766, 23498319154, 84864219966, 306764487338, 1109807490550, 4018136484386, 14558333191406

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

OFFSET

1,3

COMMENTS

Column 2 of A222649

LINKS

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

EXAMPLE

All solutions for n=3

..0..0....0..0....0..1

..0..0....0..0....1..1

..0..1....0..0....1..1