A223049 Number of nX3 0..3 arrays with exactly floor(nX3/2) elements equal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..3 order

0, 44, 1682, 101573, 4505726, 286019636, 13029003006, 847775163675, 39163069348499, 2586615582072818, 120546656751917002, 8041164730409837733, 377031919338288517436, 25328506526109972349940, 1192869061178928489347148

Offset

1,2

Comments

Column 3 of A223052

Links

R. H. Hardin, Table of n, a(n) for n = 1..114

Example

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

Crossrefs

Sequence in context: A130645 A004340 A231262 * A278793 A004295 A162882

Adjacent sequences: A223046 A223047 A223048 * A223050 A223051 A223052

Keyword

nonn

Author

R. H. Hardin Mar 13 2013

Status

approved