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A206865 Number of n X n 0..1 arrays avoiding 0 0 0 horizontally and 1 0 1 vertically 0
2, 16, 211, 7675, 728935, 159327093, 90497940567, 125050630010443, 420541855354109634, 3548467633453651525361, 73505549006944543732634211, 3751209136697289848938709033475 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A206871

LINKS

Table of n, a(n) for n=1..12.

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A004121 A188600 A206930 * A114531 A012056 A062971

Adjacent sequences:  A206862 A206863 A206864 * A206866 A206867 A206868

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 13 2012

STATUS

approved

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Last modified March 2 19:18 EST 2021. Contains 341756 sequences. (Running on oeis4.)