A186957 1/729 the number of (n+2)X6 0..2 arrays with each 3X3 subblock trace equal to some horizontal or vertical neighbor 3X3 subblock trace

19881, 3277141, 373049827, 47796308777, 6014794685157, 760608010557461, 96133158385481199, 12152638841787524045, 1536155109102267515515, 194180664943334156035447, 24545745720495840084573061

Offset

1,1

Comments

Column 4 of A186962

Links

R. H. Hardin, Table of n, a(n) for n = 1..140

Example

Some solutions for 4X6
..0..2..2..2..2..2....0..0..0..1..2..1....0..2..2..0..1..1....0..2..2..1..2..0
..0..0..0..1..1..0....0..0..0..1..0..1....0..0..0..0..0..1....0..0..0..0..0..1
..0..0..0..1..0..0....0..0..0..1..0..0....0..0..0..0..0..2....0..0..0..0..0..0
..0..0..0..1..0..2....0..0..0..0..2..2....0..0..0..2..1..1....0..0..0..0..2..1

Crossrefs

Sequence in context: A194197 A250703 A256653 * A236907 A263298 A237564

Adjacent sequences: A186954 A186955 A186956 * A186958 A186959 A186960

Keyword

nonn

Author

R. H. Hardin Mar 01 2011

Status

approved