A238512 Number of (n+1)X(3+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

295, 14407, 2074468, 232354383, 27474561391, 3210307720768, 376089959883919, 44034161734024287, 5156342833939923172, 603784568551904193175, 70700880287741698132135, 8278793823713613200756352

Offset

1,1

Comments

Column 3 of A238515

Links

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

Formula

Empirical: a(n) = 104*a(n-1) +1814*a(n-2) -33896*a(n-3) +122714*a(n-4) +37814*a(n-5) -424991*a(n-6) -78106*a(n-7) +187964*a(n-8) -38416*a(n-9)

Example

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

Crossrefs

Sequence in context: A252083 A279052 A237803 * A003780 A338592 A206339

Adjacent sequences: A238509 A238510 A238511 * A238513 A238514 A238515

Keyword

nonn

Author

R. H. Hardin, Feb 27 2014

Status

approved