A185569 Number of (n+1)X3 0..3 arrays with every 2X2 subblock sum equal to some horizontal or vertical neighbor 2X2 subblock sum

704, 15776, 319448, 7140256, 159990728, 3638705368, 82978157360, 1901358817256, 43637766654744, 1003656982121376, 23106678843303728, 532562890880016376, 12282302223948007880, 283443089332785590088, 6543858992849366363024

Offset

1,1

Comments

Column 2 of A185571

Links

R. H. Hardin, Table of n, a(n) for n = 1..63

Example

Some solutions for 5X3
..2..2..2....0..2..0....2..2..2....2..0..2....2..0..0....0..2..0....0..2..0
..2..0..2....2..0..2....0..1..2....2..0..2....2..3..0....2..0..2....0..2..0
..2..2..0....0..0..2....2..2..2....2..2..2....2..0..0....0..2..0....0..0..0
..1..1..1....1..1..1....2..2..2....1..1..2....1..3..3....2..3..2....1..3..1
..3..2..3....2..2..2....0..1..0....3..2..2....3..3..1....1..0..1....2..1..2

Crossrefs

Sequence in context: A186916 A185800 A188368 * A238322 A091553 A224491

Adjacent sequences: A185566 A185567 A185568 * A185570 A185571 A185572

Keyword

nonn

Author

R. H. Hardin Jan 31 2011

Status

approved