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A207181 Number of nX7 0..1 arrays avoiding 0 0 0 horizontally and 0 1 0 vertically 1
81, 6561, 248525, 9196215, 368714705, 14960137403, 600838995529, 24069606968809, 965286091829121, 38732271412245771, 1553999307045885583, 62342694966576014475, 2501032004180975268881, 100336844251838872157471 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A207182

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A223977 A188565 A207087 * A188752 A223572 A188872

Adjacent sequences:  A207178 A207179 A207180 * A207182 A207183 A207184

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 15 2012

STATUS

approved

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Last modified August 19 23:59 EDT 2022. Contains 356231 sequences. (Running on oeis4.)