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A206870 Number of nX7 0..1 arrays avoiding 0 0 0 horizontally and 1 0 1 vertically 1
81, 6561, 165783, 4108471, 115505069, 3254925997, 90497940567, 2513905109615, 69918135147567, 1945015733467487, 54104019551291657, 1504951979516380911, 41861310528949142861, 1164403984942205341081, 32388853771860099448897 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A206871

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A206993 A223791 A206935 * A181223 A223977 A188565

Adjacent sequences:  A206867 A206868 A206869 * A206871 A206872 A206873

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 13 2012

STATUS

approved

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Last modified January 16 23:21 EST 2022. Contains 350377 sequences. (Running on oeis4.)