A281128 Number of nX6 0..2 arrays with no element equal to more than one of its horizontal, vertical and antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.

28, 8354, 394202, 10441416, 250872018, 5550177494, 117185694820, 2402634147622, 48166257904672, 949560765788620, 18476307304202740, 355730119319074370, 6789821508663316636, 128660125727762572228, 2423000965950186875962

Offset

1,1

Comments

Column 6 of A281129.

Links

R. H. Hardin, Table of n, a(n) for n = 1..29

Example

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

Crossrefs

Cf. A281129.

Sequence in context: A203328 A159407 A099058 * A222018 A283891 A283892

Adjacent sequences: A281125 A281126 A281127 * A281129 A281130 A281131

Keyword

nonn

Author

R. H. Hardin, Jan 15 2017

Status

approved