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A208008 Number of n X n 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 0 1 and 0 1 1 vertically. 1
2, 16, 90, 841, 5952, 43264, 393049, 4084441, 32673396, 334012176, 3665311664, 37536737536, 385814058880, 4801282939489, 53629177761313, 628423124320161, 7905277739708518, 101862335149216849, 1250237739999352500 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Diagonal of A208013.
LINKS
EXAMPLE
Some solutions for n=4
..1..0..0..1....1..1..0..0....1..1..0..0....1..1..0..0....0..0..1..1
..0..0..1..1....0..0..1..0....1..0..0..1....1..1..0..0....0..1..1..0
..1..0..0..1....0..1..0..0....0..1..0..0....0..1..0..0....0..0..1..0
..0..0..1..1....0..0..1..0....1..0..0..1....0..1..0..0....0..0..1..0
CROSSREFS
Cf. A208013.
Sequence in context: A208113 A207448 A207362 * A208550 A214824 A317451
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 22 2012
STATUS
approved

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Last modified June 25 17:15 EDT 2024. Contains 373706 sequences. (Running on oeis4.)