A184070 Number of (n+1)X9 binary arrays with rows and columns in nondecreasing order and with no 2X2 subblock sum differing from a horizontal or vertical neighbor subblock sum by more than one

160, 529, 5800, 126978, 4136338, 116690636, 2770530466, 52431215293, 815858815795, 10481797492543, 110945811109376, 969268941798697, 7097493179383915, 43883325663965862, 231088111095174435

Offset

1,1

Comments

Column 8 of A184071

Links

R. H. Hardin, Table of n, a(n) for n = 1..60

Example

Some solutions for 3X9
..0..0..0..0..1..1..1..1..1....0..0..1..1..1..1..1..1..1
..0..0..1..1..0..0..0..1..1....0..1..0..0..0..0..0..1..1
..0..1..0..1..1..1..1..1..1....0..1..1..1..1..1..1..0..1
...
...0..1..2..2..2..2..3..4.......1..2..2..2..2..2..3..4...
...1..2..3..3..2..2..3..4.......2..3..2..2..2..2..2..3...

Crossrefs

Sequence in context: A138854 A133530 A278129 * A278122 A233917 A233910

Adjacent sequences: A184067 A184068 A184069 * A184071 A184072 A184073

Keyword

nonn

Author

R. H. Hardin Jan 09 2011

Status

approved