A239152 Number of (n+1)X(3+1) 0..3 arrays with no element equal to all horizontal neighbors or unequal to all vertical neighbors, and new values 0..3 introduced in row major order

7, 7, 868, 5775, 209839, 2709568, 63961519, 1049404191, 21350167780, 381843947671, 7373045875687, 135997241404032, 2577824537597143, 48074166516591223, 905276493099636196, 16948804700642238303

Offset

1,1

Comments

Column 3 of A239155

Links

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

Formula

Empirical: a(n) = 20*a(n-1) +86*a(n-2) -2504*a(n-3) +7634*a(n-4) +21878*a(n-5) -95663*a(n-6) +32018*a(n-7) +100940*a(n-8) -38416*a(n-9)

Example

Some solutions for n=5
..0..1..1..0....0..1..1..2....0..1..0..2....0..1..0..2....0..1..1..2
..0..1..1..0....0..1..1..2....0..1..0..2....0..1..0..2....0..1..1..2
..1..0..1..0....1..3..2..0....3..0..0..3....2..1..3..0....1..0..1..2
..1..0..1..2....1..3..2..0....3..0..0..3....2..1..3..0....1..0..0..2
..2..3..3..2....0..3..0..1....2..0..1..2....3..1..0..2....3..2..0..1
..2..3..3..2....0..3..0..1....2..0..1..2....3..1..0..2....3..2..0..1

Crossrefs

Sequence in context: A197860 A180321 A213150 * A320914 A155846 A221114

Adjacent sequences: A239149 A239150 A239151 * A239153 A239154 A239155

Keyword

nonn

Author

R. H. Hardin, Mar 11 2014

Status

approved