A269274 Number of nX6 0..3 arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling three exactly once.

1620, 1104264, 474819408, 174924572760, 59587625651904, 19356924219624936, 6090616046325570480, 1872977567099580289656, 566116324214731470647712, 168820920854627863029497352, 49802534018235803452666079376

Offset

1,1

Comments

Column 6 of A269276.

Links

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

Formula

Empirical: a(n) = 564*a(n-1) -87462*a(n-2) +2257724*a(n-3) -21169617*a(n-4) +76236552*a(n-5) -92236816*a(n-6) for n>7

Example

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

Crossrefs

Cf. A269276.

Sequence in context: A269150 A269212 A269095 * A020418 A347039 A224722

Adjacent sequences: A269271 A269272 A269273 * A269275 A269276 A269277

Keyword

nonn

Author

R. H. Hardin, Feb 21 2016

Status

approved