A275145 Number of 5Xn 0..2 arrays with no element equal to any value at offset (-2,-2) (-1,-2) or (0,-1) and new values introduced in order 0..2.

41, 1296, 2000, 5248, 9744, 32384, 107472, 362176, 1220752, 4108688, 13848016, 46763600, 158042960, 534108640, 1804746272, 6098041456, 20605419360, 69627945984, 235280517632, 795033992240, 2686484835680, 9077858469008

Offset

1,1

Comments

Row 5 of A275142.

Links

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

Formula

Empirical: a(n) = 8*a(n-1) -27*a(n-2) +56*a(n-3) -75*a(n-4) +61*a(n-5) -28*a(n-6) +7*a(n-7) -a(n-8) for n>12

Example

Some solutions for n=5
..0..1..2..1..0. .0..1..0..1..0. .0..1..0..1..2. .0..1..0..2..1
..0..1..2..0..1. .0..2..1..0..1. .0..2..1..2..1. .0..2..1..0..2
..2..0..1..2..0. .0..2..1..0..2. .1..2..1..0..2. .1..0..2..0..2
..1..0..1..2..0. .1..0..2..0..2. .1..0..2..1..0. .2..1..2..1..0
..1..2..0..2..0. .0..1..2..1..0. .2..1..2..1..0. .0..2..0..2..0

Crossrefs

Cf. A275142.

Sequence in context: A297349 A014937 A275225 * A118451 A094455 A239251

Adjacent sequences: A275142 A275143 A275144 * A275146 A275147 A275148

Keyword

nonn

Author

R. H. Hardin, Jul 17 2016

Status

approved