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A207494 Number of n X n 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 1 and 1 0 0 vertically 1
2, 16, 102, 1004, 14253, 237576, 5715255, 163471950, 6200122170, 294261603282, 17977383927693, 1375335087129521, 138833395825965196, 17233401412131428885, 2924391663494366576782, 600552802391087361313757 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A207500

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..18

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A208282 A207236 A207955 * A207117 A208415 A207945

Adjacent sequences:  A207491 A207492 A207493 * A207495 A207496 A207497

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 18 2012

STATUS

approved

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Last modified October 19 03:10 EDT 2021. Contains 348073 sequences. (Running on oeis4.)