A186962 T(n,k)=1/729 the number of (n+2)X(k+2) 0..2 arrays with each 3X3 subblock trace equal to some horizontal or vertical neighbor 3X3 subblock trace

0, 141, 141, 831, 3783, 831, 19881, 112707, 112707, 19881, 201495, 3277141, 5903759, 3277141, 201495, 3281361, 97400287, 373049827, 373049827, 97400287, 3281361, 40300479, 2888274935, 22237406277, 47796308777, 22237406277, 2888274935

Offset

1,2

Comments

Table starts

............0..............141................831................19881

..........141.............3783.............112707..............3277141

..........831...........112707............5903759............373049827

........19881..........3277141..........373049827..........47796308777

.......201495.........97400287........22237406277........6014794685157

......3281361.......2888274935......1352397401223......760608010557461

.....40300479......85776954369.....81727735220193....96133158385481199

....582004185....2546947279751...4949074316433529.12152638841787524045

...7640173839...75630536807503.299482222563196133

.105998979105.2245787022119429

Links

R. H. Hardin, Table of n, a(n) for n = 1..71

Example

Some solutions for 5X4
..1..0..0..0....1..0..0..0....2..0..0..0....0..0..0..0....1..0..0..0
..1..0..0..0....1..0..0..0....2..0..0..0....1..0..0..0....0..0..0..0
..2..1..1..2....0..0..1..2....0..0..0..2....0..0..0..0....1..2..1..2
..1..0..1..1....0..1..1..1....2..0..0..2....0..1..2..2....0..0..0..2
..2..2..1..1....0..0..1..1....1..0..1..1....2..0..2..0....1..1..2..1

Crossrefs

Sequence in context: A137506 A036192 A364805 * A235689 A045935 A144799

Adjacent sequences: A186959 A186960 A186961 * A186963 A186964 A186965

Keyword

nonn,tabl

Author

R. H. Hardin Mar 01 2011

Status

approved