A184092 Number of (n+1)X7 0..3 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

10610, 28434, 1025854, 35402227, 1530840869, 55632308352

Offset

1,1

Comments

Column 6 of A184095

Links

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

Example

Some solutions for 3X7
..1..1..1..2..2..2..2....1..2..2..2..3..3..3....1..1..1..1..1..3..3
..1..1..2..0..1..1..2....2..1..1..1..1..1..2....1..2..2..2..3..1..2
..1..2..0..2..2..2..1....2..2..2..3..2..3..2....2..1..1..2..1..3..3
...
...4..5..5..5..6..7.......6..6..6..7..8..9.......5..6..6..7..8..9...
...5..5..4..5..6..6.......7..6..7..7..7..8.......6..6..7..8..8..9...

Crossrefs

Sequence in context: A082442 A252101 A031864 * A110018 A249229 A105304

Adjacent sequences: A184089 A184090 A184091 * A184093 A184094 A184095

Keyword

nonn

Author

R. H. Hardin Jan 09 2011

Status

approved