A196455 Number of n X 7 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 3,0,2,4,1 for x=0,1,2,3,4.

17, 320, 3966, 76809, 2032584, 46887621, 926499600, 17962317556, 351103877665, 6945098996988, 139065692664815, 2795329197283554, 56072977068447935, 1121420878698363003, 22398808824228997399, 447457890891091698310

Offset

1,1

Comments

Every 0 is next to 0 3's, every 1 is next to 1 0's, every 2 is next to 2 2's, every 3 is next to 3 4's, every 4 is next to 4 1's.

Column 7 of A196456.

Links

R. H. Hardin, Table of n, a(n) for n = 1..95

Example

Some solutions for n=4
..2..2..2..1..1..1..0....0..1..1..0..0..1..1....0..1..1..0..0..0..0
..2..0..2..0..0..2..2....0..2..2..2..2..2..0....2..2..1..0..0..0..0
..2..2..2..1..1..2..2....0..2..0..0..1..2..0....2..2..1..0..0..2..2
..0..0..0..1..1..0..0....1..2..2..2..2..2..1....0..0..1..1..1..2..2

Crossrefs

Cf. A196456.

Sequence in context: A331492 A244764 A089571 * A217960 A221583 A091464

Adjacent sequences: A196452 A196453 A196454 * A196456 A196457 A196458

Keyword

nonn

Author

R. H. Hardin, Oct 02 2011

Status

approved