A238510 Number of (n+1)X(1+1) 0..3 arrays with no element equal to all horizontal neighbors or equal to all vertical neighbors, and new values 0..3 introduced in row major order

4, 25, 295, 3113, 33837, 365740, 3958594, 42834071, 463516595, 5015744275, 54275869563, 587324222844, 6355490845488, 68773364113485, 744203045653967, 8053091185427477, 87143257529984401, 942985390024669100

Offset

1,1

Comments

Column 1 of A238515

Links

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

Formula

Empirical: a(n) = 10*a(n-1) +13*a(n-2) -44*a(n-3) -7*a(n-4) +14*a(n-5)

Example

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

Crossrefs

Sequence in context: A216660 A352859 A350585 * A222982 A259591 A093959

Adjacent sequences: A238507 A238508 A238509 * A238511 A238512 A238513

Keyword

nonn

Author

R. H. Hardin, Feb 27 2014

Status

approved