A186956 1/729 the number of (n+2) X 5 0..2 arrays with each 3 X 3 subblock trace equal to some horizontal or vertical neighbor 3 X 3 subblock trace.

831, 112707, 5903759, 373049827, 22237406277, 1352397401223, 81727735220193, 4949074316433529, 299482222563196133, 18126731672199604237, 1097073061584956632581, 66399141979879392520485, 4018701375112198323802019, 243226102750316085448439227, 14720895904576940988038876719

Offset

1,1

Links

R. H. Hardin, Table of n, a(n) for n = 1..200

Example

Some solutions for 4 X 5:
..0..0..1..0..0....0..1..0..1..2....1..0..0..2..2....1..0..0..2..0
..0..0..0..0..2....0..0..0..2..2....0..0..1..0..1....0..0..1..1..0
..0..0..2..1..0....0..0..2..1..0....0..0..1..1..2....0..0..0..0..2
..0..0..2..0..1....0..0..2..0..1....0..0..2..1..0....0..0..2..2..2

Crossrefs

Column 3 of A186962.

Sequence in context: A125519 A351666 A045070 * A252561 A264318 A264141

Adjacent sequences: A186953 A186954 A186955 * A186957 A186958 A186959

Keyword

nonn

Author

R. H. Hardin, Mar 01 2011

Status

approved