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A204864 Number of (n+2)X7 0..1 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically, diagonally or antidiagonally exactly two different ways, and new values 0..1 introduced in row major order 1
20113, 136899, 1013668, 7620885, 59491439, 462259671, 3572132537, 27779761123, 216129338685, 1675476437558, 13027242027202, 101268097797410, 786267089036436, 6110786429125854, 47489850472550153, 368897712406751027 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A204867

LINKS

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

EXAMPLE

Some solutions for n=3

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

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

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

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

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

CROSSREFS

Sequence in context: A251880 A186565 A186480 * A145535 A190474 A109479

Adjacent sequences:  A204861 A204862 A204863 * A204865 A204866 A204867

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 20 2012

STATUS

approved

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Last modified May 15 08:59 EDT 2021. Contains 343909 sequences. (Running on oeis4.)