A184613 Half the number of (n+1)X9 binary arrays with no 2X2 subblock sum differing from a horizontal or vertical neighbor subblock sum by more than one

56426, 6519094, 764691186, 98736408638, 12592730376316, 1594748121566704, 201958235918095986, 25614152794948938706, 3247744668128361058130, 411769404731317015727428

Offset

1,1

Comments

Column 8 of A184614

Links

Table of n, a(n) for n=1..10.

Example

Some solutions for 3X9
..0..0..0..0..0..0..0..1..0....0..0..0..0..0..0..0..0..1
..0..0..1..1..1..0..1..0..1....0..1..0..0..0..1..1..0..1
..0..0..0..0..1..0..1..1..1....1..0..0..0..1..0..1..0..0
...
...0..1..2..2..1..1..2..2.......1..1..0..0..1..2..1..2...
...0..1..2..3..2..2..3..3.......2..1..0..1..2..3..2..1...

Crossrefs

Sequence in context: A244294 A234488 A348100 * A202433 A329270 A190836

Adjacent sequences: A184610 A184611 A184612 * A184614 A184615 A184616

Keyword

nonn

Author

R. H. Hardin Jan 18 2011

Status

approved