A208255 Number of nX5 0..2 arrays with new values 0..2 introduced in row major order and no element equal to more than one of its immediate leftward or upward neighbors

41, 6144, 920928, 137947632, 20662697664, 3094987890864, 463586569433280, 69438884409258336, 10400988693344761104, 1557924881981189122032, 233355694295516814615312, 34953469637696859885114528

Offset

1,1

Comments

Column 5 of A208258

Links

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

Formula

Empirical: a(n) = 171*a(n-1) -3370*a(n-2) +29805*a(n-3) -149108*a(n-4) +447784*a(n-5) -778496*a(n-6) +649216*a(n-7) -114688*a(n-8) for n>9

Example

Some solutions for n=4
..0..0..1..2..0....0..0..0..0..1....0..1..0..2..2....0..0..1..2..2
..2..1..0..2..1....0..1..0..2..1....2..0..1..2..0....1..1..2..1..2
..2..1..2..0..1....0..0..2..0..0....1..1..2..1..0....1..2..0..2..0
..2..0..2..2..2....0..2..0..1..1....1..2..0..2..2....1..0..2..0..1

Crossrefs

Sequence in context: A101830 A223130 A091758 * A221325 A104301 A221300

Adjacent sequences: A208252 A208253 A208254 * A208256 A208257 A208258

Keyword

nonn

Author

R. H. Hardin Feb 24 2012

Status

approved