A266657 Number of 4Xn arrays containing n copies of 0..4-1 with no element 1 greater than its northeast neighbor modulo 4 and the upper left element equal to 0.

6, 234, 14540, 1044230, 81918724, 6799306012, 587026055968, 52178873655200, 4743093016860180, 438882927135198876, 41201333430973995312, 3914496456510827388928, 375684251811756396598000

Offset

1,1

Comments

Row 4 of A266655.

Links

R. H. Hardin, Table of n, a(n) for n = 1..34

Example

Some solutions for n=3
..0..2..3....0..3..3....0..3..2....0..1..3....0..2..3....0..1..3....0..3..3
..0..3..0....2..2..0....1..2..1....1..3..3....0..3..3....3..1..0....1..1..0
..1..3..2....0..3..1....2..0..3....1..2..2....1..2..1....0..2..3....1..0..2
..1..1..2....2..1..1....3..1..0....2..0..0....0..1..2....2..1..2....2..2..3

Crossrefs

Cf. A266655.

Sequence in context: A194482 A309330 A362733 * A145180 A256275 A235346

Adjacent sequences: A266654 A266655 A266656 * A266658 A266659 A266660

Keyword

nonn

Author

R. H. Hardin, Jan 02 2016

Status

approved