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A208374 Number of n X n 0..1 arrays avoiding 0 0 0 and 1 1 1 horizontally and 0 0 1 and 1 0 1 vertically 1
2, 16, 72, 420, 2176, 10660, 60984, 340816, 1846240, 11076228, 66303360, 390426916, 2456007216, 15586002640, 98058552648, 645057461220, 4299810563584, 28563593727716, 195777751059000, 1361449965542992, 9468978890210480 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A208379

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..39

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A006729 A007758 A207874 * A207677 A207508 A208063

Adjacent sequences:  A208371 A208372 A208373 * A208375 A208376 A208377

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 25 2012

STATUS

approved

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Last modified June 16 21:20 EDT 2019. Contains 324155 sequences. (Running on oeis4.)