A185571 T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with every 2X2 subblock sum equal to some horizontal or vertical neighbor 2X2 subblock sum

0, 704, 704, 1936, 15776, 1936, 34816, 319448, 319448, 34816, 172992, 7140256, 13565936, 7140256, 172992, 2053216, 159990728, 886180500, 886180500, 159990728, 2053216, 12950528, 3638705368, 48714917964

Offset

1,2

Comments

Table starts

.......0.......704......1936.....34816......172992....2053216.12950528

.....704.....15776....319448...7140256...159990728.3638705368

....1936....319448..13565936.886180500.48714917964

...34816...7140256.886180500

..172992.159990728

.2053216

Links

Table of n, a(n) for n=1..24.

Example

Some solutions for 4X3
..2..0..3....2..2..3....2..0..3....2..0..2....2..2..3....0..2..0....0..3..0
..2..3..1....3..2..2....3..1..3....2..3..2....3..2..0....0..0..0....0..3..0
..1..2..2....3..0..1....1..1..2....3..3..3....1..3..2....3..2..3....1..1..1
..2..3..1....3..2..2....3..2..2....1..2..1....2..0..1....0..2..0....0..1..0

Crossrefs

Sequence in context: A257721 A253396 A188370 * A186923 A185807 A105846

Adjacent sequences: A185568 A185569 A185570 * A185572 A185573 A185574

Keyword

nonn,tabl

Author

R. H. Hardin Jan 31 2011

Status

approved