A230474 Number of 6Xn 0..2 arrays x(i,j) with each element horizontally, diagonally or antidiagonally next to at least one element with value (x(i,j)+1) mod 3, and upper left element zero

0, 108, 212124, 89087722, 26096227960, 8449174734112, 2758566554003680, 904244478978586756, 295941932913142341798, 96849125946877824151546, 31693448711292793725498984, 10371762620901942054031501472

Offset

1,2

Comments

Row 6 of A230469

Links

R. H. Hardin, Table of n, a(n) for n = 1..44

Example

Some solutions for n=3
..0..1..0....0..1..0....0..1..0....0..1..0....0..1..0....0..1..1....0..1..1
..0..0..2....2..2..2....2..1..0....2..2..2....2..2..0....2..2..0....2..2..1
..0..2..1....2..0..1....1..0..2....2..0..1....2..0..1....1..0..0....2..0..2
..1..1..1....1..1..0....2..2..0....2..1..2....2..2..2....2..1..2....2..1..2
..0..0..2....0..2..0....0..1..1....2..2..0....1..1..0....2..2..0....0..0..2
..2..1..0....2..0..1....2..0..0....1..0..1....0..2..1....2..0..1....1..2..2

Crossrefs

Sequence in context: A202634 A270255 A269269 * A030248 A033535 A077728

Adjacent sequences: A230471 A230472 A230473 * A230475 A230476 A230477

Keyword

nonn

Author

R. H. Hardin, Oct 20 2013

Status

approved