A184078 Number of (n+1)X7 0..2 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

1499, 4233, 104404, 2628898, 78169918, 2187790488, 53028481224, 1151733506397, 21165595491118, 339958386144679, 4886934677532449, 62202950868729265, 707763287958565724, 7237027155001951521

Offset

1,1

Comments

Column 6 of A184081

Links

Table of n, a(n) for n=1..14.

Example

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

Crossrefs

Sequence in context: A345781 A328974 A236732 * A098191 A253509 A237136

Adjacent sequences: A184075 A184076 A184077 * A184079 A184080 A184081

Keyword

nonn

Author

R. H. Hardin Jan 09 2011

Status

approved