A285024 - OEIS

A285024

Number of n X 2 0..1 arrays with the number of 1's horizontally, antidiagonally or vertically adjacent to some 0 one less than the number of 0's adjacent to some 1.

0, 2, 6, 26, 104, 402, 1578, 6196, 24310, 95446, 374872, 1472938, 5790024, 22768624, 89562540, 352395768, 1386874908, 5459330780, 21494802570, 84648191106, 333419873528, 1313575442496, 5176174458602, 20401118165166, 80425006887898

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

OFFSET

1,2

COMMENTS

Column 2 of A285030.

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

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