A265193 Number of 3Xn arrays containing n copies of 0..3-1 with no equal horizontal or antidiagonal neighbors and new values introduced sequentially from 0.

1, 5, 17, 42, 155, 511, 2023, 7760, 31395, 127575, 526459, 2194344, 9206121, 38933281, 165380299, 706470350, 3028761985, 13037475319, 56289258695, 243772244956, 1058354286379, 4606025822849, 20087808189187, 87780004451864

Offset

1,2

Comments

Row 3 of A265192.

Links

R. H. Hardin, Table of n, a(n) for n = 1..129

Example

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

Crossrefs

Cf. A265192.

Sequence in context: A088645 A055609 A231703 * A146720 A146640 A100705

Adjacent sequences: A265190 A265191 A265192 * A265194 A265195 A265196

Keyword

nonn

Author

R. H. Hardin, Dec 04 2015

Status

approved