login
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
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
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
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 04 2015
STATUS
approved