A265883 Number of 3Xn arrays containing n copies of 0..3-1 with no element plus any horizontal neighbor equal to 3-1.

6, 24, 152, 894, 5748, 38296, 263484, 1849602, 13192840, 95268876, 694784964, 5108061670, 37808693148, 281458023972, 2105591552060, 15819570917916, 119302287092028, 902712209530524, 6850780687656012, 52130155754678238

Offset

1,1

Comments

Row 3 of A265882.

Links

R. H. Hardin, Table of n, a(n) for n = 1..87

Example

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

Crossrefs

Cf. A265882.

Sequence in context: A026947 A366757 A250743 * A330498 A165491 A165638

Adjacent sequences: A265880 A265881 A265882 * A265884 A265885 A265886

Keyword

nonn

Author

R. H. Hardin, Dec 17 2015

Status

approved