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A222661
Number of nX3 0..3 arrays with exactly floor(nX3/2) elements unequal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..3 order
1
0, 2, 2, 44, 110, 2686, 7624, 186400, 568750, 13426930, 43148672, 976797964, 3288287090, 71553941138, 250795793620, 5271389823322, 19133542669712, 390312748312702, 1460010782595862, 29031771420777158, 111430693524389896
OFFSET
1,2
COMMENTS
Column 3 of A222666
LINKS
EXAMPLE
All solutions for n=3
..0..0..0....0..0..1
..0..0..0....0..0..0
..1..0..0....0..0..0
CROSSREFS
Sequence in context: A349602 A156467 A303538 * A015167 A086204 A318085
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 28 2013
STATUS
approved