A188368 Number of (n+1)X3 0..3 arrays with every 2X2 subblock sum equal to exactly one or two horizontal and vertical neighbor 2X2 subblock sums

704, 15776, 315520, 6781400, 146491208, 3204417424, 70324529528, 1550290704312, 34247741174176, 758246919492968, 16810324686733992, 373161215486655440, 8291015786317391720, 184361263940488110328, 4102028210533831306896

Offset

1,1

Comments

Column 2 of A188370

Links

R. H. Hardin, Table of n, a(n) for n = 1..54

Example

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

Crossrefs

Sequence in context: A185799 A186916 A185800 * A185569 A238322 A091553

Adjacent sequences: A188365 A188366 A188367 * A188369 A188370 A188371

Keyword

nonn

Author

R. H. Hardin Mar 29 2011

Status

approved