A207209 Number of 3Xn 0..2 arrays avoiding the pattern z-1 z-1 z in any row, column, nw-to-se diagonal or ne-to-sw antidiagonal

25, 625, 11047, 192640, 3375548, 59151458, 1037800112, 18215805862, 319825973303, 5615850283553, 98614829798053, 1731697303682807, 30409166647098498, 533994742590497215, 9377124049344199017

Offset

1,1

Comments

Row 3 of A207208

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

Some solutions for n=5
..2..0..1..1..0....2..2..0..2..2....2..1..2..1..2....1..1..1..0..2
..1..1..0..2..0....0..2..2..0..0....2..1..2..0..0....1..0..2..0..0
..0..1..2..2..2....2..0..1..1..0....2..0..0..2..2....1..0..2..0..2

Crossrefs

Sequence in context: A207739 A288854 A208081 * A207203 A206858 A068180

Adjacent sequences: A207206 A207207 A207208 * A207210 A207211 A207212

Keyword

nonn

Author

R. H. Hardin Feb 15 2012

Status

approved