A186958 1/729 the number of (n+2)X7 0..2 arrays with each 3X3 subblock trace equal to some horizontal or vertical neighbor 3X3 subblock trace

201495, 97400287, 22237406277, 6014794685157, 1557834542977401, 411931941306416847, 108124495560461502429, 28454687244738848695377, 7482086662398565239408367, 1967930140348277322040712515

Offset

1,1

Comments

Column 5 of A186962

Links

R. H. Hardin, Table of n, a(n) for n = 1..19

Example

Some solutions for 4X7
..0..0..1..1..0..0..1....0..0..1..1..2..0..2....0..0..1..0..2..0..0
..0..0..0..2..2..2..1....0..0..0..1..1..0..0....0..0..0..1..2..2..2
..0..0..0..0..0..0..1....0..0..0..0..0..0..1....0..0..0..0..1..1..1
..0..0..0..0..0..0..0....0..0..0..0..0..1..2....0..0..0..0..0..1..2

Crossrefs

Sequence in context: A179224 A237374 A202316 * A184406 A036319 A241060

Adjacent sequences: A186955 A186956 A186957 * A186959 A186960 A186961

Keyword

nonn

Author

R. H. Hardin Mar 01 2011

Status

approved