A207891 Number of n X n 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 0 0 and 1 1 1 vertically

2, 16, 84, 870, 11196, 205258, 5888458, 243318702, 13997746826, 1221755612002, 156218303323950, 28414320426633740, 7652673923813342076, 3016400502880224884497, 1720903600232362236817474

Offset

1,1

Comments

Diagonal of A207895

Links

R. H. Hardin, Table of n, a(n) for n = 1..16

Example

Some solutions for n=4
..0..0..1..1....1..1..0..0....1..1..0..0....1..1..1..1....0..0..1..0
..1..1..1..1....0..0..1..0....0..0..1..1....1..1..0..0....1..1..0..0
..0..1..0..0....0..1..1..1....1..1..0..0....0..0..1..0....0..1..1..1
..0..0..1..0....1..0..0..1....1..0..0..1....1..0..0..1....1..0..0..1

Crossrefs

Sequence in context: A283951 A207340 A207768 * A207655 A071893 A220505

Adjacent sequences: A207888 A207889 A207890 * A207892 A207893 A207894

Keyword

nonn

Author

R. H. Hardin Feb 21 2012

Status

approved