A281603 Number of nX6 0..2 arrays with no element equal to more than one of its horizontal, diagonal or antidiagonal neighbors and with new values introduced in order 0 sequentially upwards.

82, 1708, 49572, 1626073, 52899445, 1732267694, 56764280423, 1860912910152, 61012156448915, 2000405755119383, 65587722113126449, 2150442541118935258, 70507185356580640501, 2311739967430549263763, 75795706200446791975455

Offset

1,1

Comments

Column 6 of A281605.

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

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

Crossrefs

Cf. A281605.

Sequence in context: A085439 A282155 A280857 * A234253 A031606 A232904

Adjacent sequences: A281600 A281601 A281602 * A281604 A281605 A281606

Keyword

nonn

Author

R. H. Hardin, Jan 25 2017

Status

approved