

A204968


Number of (n+2)X7 0..1 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically, diagonally or antidiagonally at least two different ways, and new values 0..1 introduced in row major order


1



219755, 11064389, 547910909, 26548318278, 1294422106052, 63103000253312, 3075660728764228, 149917008692340855, 7307374345089599577, 356181560686179960227, 17361282472044746608190, 846237255084435072552419
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OFFSET

1,1


COMMENTS

Column 5 of A204971


LINKS

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


EXAMPLE

Some solutions for n=3
..0..1..0..1..0..1..1....0..0..1..0..0..1..0....0..0..1..0..1..1..0
..0..0..0..1..1..0..0....1..1..1..0..0..1..1....0..0..0..1..0..1..0
..1..0..0..1..0..0..0....0..1..1..0..1..1..1....0..0..1..1..1..1..0
..0..0..0..0..0..0..0....1..1..0..0..0..1..0....1..1..1..1..1..1..1
..1..1..0..0..1..0..0....1..1..1..0..1..0..0....1..1..1..1..1..1..1


CROSSREFS

Sequence in context: A254912 A254905 A257207 * A234489 A223369 A254509
Adjacent sequences: A204965 A204966 A204967 * A204969 A204970 A204971


KEYWORD

nonn


AUTHOR

R. H. Hardin Jan 21 2012


STATUS

approved



