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A207164 Number of n X n 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 0 1 and 1 0 1 vertically 1
2, 16, 90, 603, 3445, 15789, 98224, 645217, 3227100, 18747520, 128798244, 720878886, 4180036645, 28917238756, 176708726320, 1057330250552, 7322809072734, 47678383274385, 297647051017140, 2072720881428948 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A207169

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..27

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A207595 A253487 A207019 * A208113 A207448 A207362

Adjacent sequences: A207161 A207162 A207163 * A207165 A207166 A207167

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 15 2012

STATUS

approved

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Last modified January 31 01:17 EST 2023. Contains 359947 sequences. (Running on oeis4.)