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A240655 Number of nX7 0..1 arrays with no element equal to exactly one horizontal or vertical neighbor, with new values 0..1 introduced in row major order 1
1, 21, 402, 7154, 118863, 2076117, 37066859, 666849212, 12062165754, 218944306666, 3980414427158, 72424065007263, 1318344476372801, 24003514023779867, 437093903871650760, 7959828410582705257 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 7 of A240656

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A285396 A113363 A223459 * A014903 A219308 A020534

Adjacent sequences:  A240652 A240653 A240654 * A240656 A240657 A240658

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 09 2014

STATUS

approved

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Last modified February 20 22:51 EST 2019. Contains 320362 sequences. (Running on oeis4.)