A184091 Number of (n+1)X6 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

4434, 9945, 235003, 4086234, 91203410, 1530840869, 25951449861, 378836704735, 5421933385547, 70790071870211, 908625271297609, 10965432938482878, 129231185861933066, 1437619815424773671

Offset

1,1

Comments

Column 5 of A184095

Links

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

Example

Some solutions for 3X6
..1..1..2..3..3..3....1..1..2..2..3..3....1..2..2..2..2..2....1..1..1..1..2..2
..1..3..1..0..0..1....1..3..0..3..0..1....2..0..1..1..1..2....1..1..2..2..0..2
..2..1..2..3..3..2....2..1..3..1..3..3....2..2..2..2..2..1....1..2..0..1..2..1
...
...6..7..6..6..7.......6..6..7..8..7.......5..5..6..6..7.......4..5..6..5..6...
...7..7..6..6..6.......7..7..7..7..7.......6..5..6..6..6.......5..5..5..5..5...

Crossrefs

Sequence in context: A275773 A060363 A128194 * A309487 A206016 A091739

Adjacent sequences: A184088 A184089 A184090 * A184092 A184093 A184094

Keyword

nonn

Author

R. H. Hardin Jan 09 2011

Status

approved