A184067 Number of (n+1)X6 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

54, 134, 924, 7671, 56723, 288744, 1201502, 4136338, 11927710, 29250767, 62876028, 120904433, 212281665, 345771803, 530007739, 773304379, 1083892502, 1469984808, 1939804454, 2501586120, 3163566510, 3933982328, 4821070278, 5833067064

Offset

1,1

Comments

Column 5 of A184071

Links

R. H. Hardin, Table of n, a(n) for n = 1..200

Example

Some solutions for 3X6
..0..0..0..0..0..1....0..0..0..0..1..1....0..1..1..1..1..1....0..0..0..1..1..1
..0..0..0..1..1..0....0..0..1..1..0..0....1..0..0..0..0..1....0..1..1..0..0..0
..0..0..1..0..1..0....0..1..0..1..0..1....1..0..1..1..1..0....1..0..0..0..1..1
...
...0..0..1..2..2.......0..1..2..2..2.......2..2..2..2..3.......1..2..2..2..2...
...0..1..2..3..2.......1..2..3..2..1.......2..1..2..2..2.......2..2..1..1..2...

Crossrefs

Sequence in context: A044241 A044622 A255021 * A044305 A044686 A108780

Adjacent sequences: A184064 A184065 A184066 * A184068 A184069 A184070

Keyword

nonn

Author

R. H. Hardin Jan 09 2011

Status

approved