A206654 - OEIS

A206654

Number of (n+2)X5 0..1 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically or nw-to-se diagonally exactly two ways, and new values 0..1 introduced in row major order

1517, 8374, 50529, 305347, 1839784, 11172263, 67724531, 410177144, 2486962308, 15075219306, 91365402832, 553811854726, 3356885567485, 20346820069282, 123328702944406, 747537064469943, 4531048838872687, 27464108126394996

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

OFFSET

1,1

COMMENTS

Column 3 of A206659

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

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