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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 1
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

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

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

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

CROSSREFS

Sequence in context: A020415 A257753 A236724 * A112641 A203386 A157375

Adjacent sequences:  A206651 A206652 A206653 * A206655 A206656 A206657

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 11 2012

STATUS

approved

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Last modified October 31 00:25 EDT 2020. Contains 338095 sequences. (Running on oeis4.)