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A207677 Number of n X n 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 0 1 and 1 1 1 vertically 0
2, 16, 72, 436, 2310, 11994, 65564, 379618, 2306234, 15546084, 105736196, 882008157, 7460256028, 79554888778, 842718226878, 10871887456045, 151150820925264, 2491064356652975, 43353562677488606, 900988265135221518 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A207682

LINKS

Table of n, a(n) for n=1..20.

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A007758 A207874 A208374 * A207508 A208063 A207923

Adjacent sequences:  A207674 A207675 A207676 * A207678 A207679 A207680

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 19 2012

STATUS

approved

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Last modified June 19 13:11 EDT 2019. Contains 324222 sequences. (Running on oeis4.)