A186141 T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with no 2X2 subblock trace equal to any horizontal or vertical neighbor 2X2 subblock trace

81, 558, 558, 3888, 7686, 3888, 27000, 107874, 107874, 27000, 187704, 1512792, 3090564, 1512792, 187704, 1304424, 21216780, 88110594, 88110594, 21216780, 1304424, 9066168, 297562572, 2513594016, 5108761008, 2513594016, 297562572

Offset

1,1

Comments

Table starts

.........81............558..............3888.................27000

........558...........7686............107874...............1512792

.......3888.........107874...........3090564..............88110594

......27000........1512792..........88110594............5108761008

.....187704.......21216780........2513594016..........296649133848

....1304424......297562572.......71683161894........17226840778164

....9066168.....4173269994.....2044563391476......1000411106914620

...63009576....58529531286....58311925687818.....58096554299749404

..437922936...820868250834..1663128694130598...3373827362098348122

.3043586664.11512560545838.47433932055670734.195927401888880256332

Links

R. H. Hardin, Table of n, a(n) for n = 1..127

Example

Some solutions for 4X3
..0..0..2....1..2..2....1..1..1....0..2..2....2..2..0....2..0..1....2..1..0
..2..2..1....0..2..2....2..2..0....1..0..2....0..0..1....2..2..0....1..0..0
..1..1..0....0..2..1....2..0..1....1..0..2....2..1..2....1..0..2....0..2..0
..0..1..2....0..0..2....2..2..1....2..2..0....2..1..0....1..0..2....1..0..1

Crossrefs

Sequence in context: A253164 A185777 A253482 * A185771 A186133 A209506

Adjacent sequences: A186138 A186139 A186140 * A186142 A186143 A186144

Keyword

nonn,tabl

Author

R. H. Hardin Feb 13 2011

Status

approved