A222270 - OEIS

A222270

Number of nX2 0..3 arrays with exactly floor(nX2/2) elements unequal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..3 order

0, 0, 4, 13, 40, 162, 888, 3617, 18136, 81560, 407644, 1901375, 9349056, 44712494, 218395880, 1057844425, 5154076928, 25146813236, 122532346416, 600293886818, 2928771248408, 14383619678744, 70298507431888, 345790800489643

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

OFFSET

1,3

COMMENTS

Column 2 of A222275

LINKS

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

EXAMPLE

All solutions for n=3

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

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

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