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A207420 Number of n X n 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 1 and 0 1 0 vertically 0
2, 16, 114, 1521, 55361, 3892729, 474552171, 116947584576, 59951676534906, 60921409199181129, 121441530119384020545, 483128923550195512221129, 3857404253001354057074186601, 61418617253685924322130029824769 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A207426

LINKS

Table of n, a(n) for n=1..14.

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A037564 A125725 A288965 * A207736 A208364 A207711

Adjacent sequences:  A207417 A207418 A207419 * A207421 A207422 A207423

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 17 2012

STATUS

approved

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Last modified April 17 12:35 EDT 2021. Contains 343063 sequences. (Running on oeis4.)