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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
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
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 25 2012
STATUS
approved

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Last modified June 15 13:08 EDT 2024. Contains 373407 sequences. (Running on oeis4.)