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A207945 Number of n X n 0..1 arrays avoiding 0 0 1 and 0 1 1 horizontally and 0 1 0 and 1 0 1 vertically 1
2, 16, 102, 1369, 18172, 362404, 7513176, 208947025, 6018764552, 220642515076, 8323556149400, 385679126851225, 18298351908731960, 1039016878950507076, 60196918693633189580, 4091835726607570472281, 283040172741877232421150 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A207949

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..50

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A207494 A207117 A208415 * A207853 A208022 A207803

Adjacent sequences:  A207942 A207943 A207944 * A207946 A207947 A207948

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 21 2012

STATUS

approved

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Last modified September 25 04:45 EDT 2021. Contains 347652 sequences. (Running on oeis4.)