A223038 Number of nX3 0..3 arrays with no more than floor(nX3/2) elements equal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..3 order

2, 98, 3780, 255943, 10904199, 751990800, 33007705273, 2293741863398, 102466787449225, 7147587418650349, 323100169712798727, 22585791054054582654, 1029786157956416130280, 72077809347126994984977

Offset

1,1

Comments

Column 3 of A223041

Links

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

Example

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

Crossrefs

Sequence in context: A317068 A316949 A317729 * A324266 A258399 A212838

Adjacent sequences: A223035 A223036 A223037 * A223039 A223040 A223041

Keyword

nonn

Author

R. H. Hardin Mar 12 2013

Status

approved