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A206988 Number of n X n 0..1 arrays avoiding 0 0 0 horizontally and 1 1 1 vertically 0
2, 16, 174, 6510, 516724, 88819714, 37849652838, 36679559167444, 82039130470188394, 429029852979061855882, 5194153238714571994969836, 145816870651378340099973452074 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Diagonal of A206994
LINKS
EXAMPLE
Some solutions for n=4
..1..1..1..1....1..0..1..0....1..0..0..1....1..0..1..0....0..1..0..1
..1..1..0..1....1..1..0..1....0..1..1..0....1..0..0..1....1..1..1..0
..0..0..1..0....0..1..0..0....1..0..1..1....0..1..0..0....0..0..1..0
..1..1..1..0....1..0..1..0....1..1..0..1....0..1..0..0....0..1..0..1
CROSSREFS
Sequence in context: A355408 A367384 A138014 * A217360 A371669 A363311
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 14 2012
STATUS
approved

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Last modified April 13 05:14 EDT 2024. Contains 371639 sequences. (Running on oeis4.)