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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
1
2, 98, 3780, 255943, 10904199, 751990800, 33007705273, 2293741863398, 102466787449225, 7147587418650349, 323100169712798727, 22585791054054582654, 1029786157956416130280, 72077809347126994984977
OFFSET
1,1
COMMENTS
Column 3 of A223041
LINKS
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
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 12 2013
STATUS
approved