A239538 Number of (4+1)X(n+1) 0..2 arrays with no element equal to all horizontal neighbors or unequal to all vertical neighbors, and new values 0..2 introduced in row major order

13, 68, 1014, 11108, 131988, 1533792, 17931608, 209295248, 2443954640, 28534764096, 333172950560, 3890104752256, 45420709489664, 530330059963392, 6192109859155200, 72298791884174336, 844157402919585408

Offset

1,1

Comments

Row 4 of A239537

Links

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

Formula

Empirical: a(n) = 8*a(n-1) +46*a(n-2) -22*a(n-3) -166*a(n-4) +28*a(n-5) +68*a(n-6) +208*a(n-7) -160*a(n-8) -48*a(n-9) +32*a(n-10)

Example

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

Crossrefs

Sequence in context: A258618 A093119 A362102 * A156794 A137188 A055338

Adjacent sequences: A239535 A239536 A239537 * A239539 A239540 A239541

Keyword

nonn

Author

R. H. Hardin, Mar 21 2014

Status

approved