A208319 Number of nX5 0..2 arrays with new values 0..2 introduced in row major order and no element equal to more than two of its immediate leftward or upward or left-upward diagonal neighbors

41, 8534, 1815496, 385979024, 82063614224, 17447625342768, 3709557427849168, 788692779445041968, 167684774537312518864, 35651630574858499118384, 7579929460852910488007888, 1611576517120239045459431728

Offset

1,1

Comments

Column 5 of A208322

Links

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

Formula

Empirical: a(n) = 197*a(n-1) +3456*a(n-2) -27886*a(n-3) -272376*a(n-4) +2523280*a(n-5) -5952064*a(n-6) +3277568*a(n-7) +2841600*a(n-8) -1871872*a(n-9) -540672*a(n-10) for n>11

Example

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

Crossrefs

Sequence in context: A199652 A241111 A198713 * A201171 A208389 A282273

Adjacent sequences: A208316 A208317 A208318 * A208320 A208321 A208322

Keyword

nonn

Author

R. H. Hardin Feb 25 2012

Status

approved