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A241116
Number of nX4 0..3 arrays with no element equal to exactly three horizontal or vertical neighbors, with new values 0..3 introduced in row major order
1
15, 2614, 587555, 134229632, 30679522712, 7012241396116, 1602748583683541, 366331237082570675, 83730272300093086129, 19137757826895828304001, 4374209764040662469308200, 999788545392696494568265298
OFFSET
1,1
COMMENTS
Column 4 of A241119
FORMULA
Empirical recurrence of order 74 (see link above)
EXAMPLE
Some solutions for n=2
..0..1..1..1....0..1..2..0....0..1..2..0....0..1..1..2....0..1..2..1
..2..3..2..3....2..3..2..3....0..1..0..1....1..1..2..0....2..2..2..0
CROSSREFS
Sequence in context: A278410 A211902 A200797 * A126678 A340185 A208197
KEYWORD
nonn
AUTHOR
R. H. Hardin, Apr 16 2014
STATUS
approved