A183746 Number of (n+1) X 8 0..2 arrays with equal numbers of 2 X 2 subblocks with sum over 4 and with sum under 4.

5262685, 20777533329, 107098914678533, 600788747889666009, 3503521879176480796529, 20903404048556272844034529

Offset

1,1

Comments

Column 7 of A183748.

Links

Table of n, a(n) for n=1..6.

Example

Some solutions for 3 X 8:
..0..0..0..2..1..1..1..1....0..0..0..2..2..0..2..2....0..0..0..0..0..1..2..2
..0..0..0..0..2..0..2..1....0..0..0..0..2..2..1..2....0..0..0..0..2..2..0..2
..0..0..0..1..2..2..2..1....0..0..0..1..1..0..1..2....0..0..0..2..2..2..2..1
...
...M..M..M..P..E..E..P.......M..M..M..P..P..P..P.......M..M..M..M..P..P..P...
...M..M..M..P..P..P..P.......M..M..M..E..P..E..P.......M..M..M..P..P..P..P...

Crossrefs

Sequence in context: A333587 A125780 A294988 * A183706 A236711 A184782

Adjacent sequences: A183743 A183744 A183745 * A183747 A183748 A183749

Keyword

nonn

Author

R. H. Hardin, Jan 06 2011

Status

approved