A265857 Number of 3Xn arrays containing n copies of 0..3-1 with no element plus any horizontal or antidiagonal neighbor equal to 3-1.

6, 10, 30, 42, 154, 478, 2086, 8094, 33766, 139874, 595738, 2519882, 10738874, 45886078, 196936610, 847655270, 3659989354, 15844521472, 68767896826, 299141921948, 1304016379938, 5695400116694, 24919428238882, 109210581420200

Offset

1,1

Comments

Row 3 of A265856.

Links

R. H. Hardin, Table of n, a(n) for n = 1..96

Example

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

Crossrefs

Cf. A265856.

Sequence in context: A272278 A272508 A218553 * A256865 A163478 A130440

Adjacent sequences: A265854 A265855 A265856 * A265858 A265859 A265860

Keyword

nonn

Author

R. H. Hardin, Dec 16 2015

Status

approved