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A233483
Number of (n+2)X(1+2) 0..3 arrays with no increasing sequence of length 3 horizontally, diagonally downwards or vertically
1
172952, 8254896, 386906152, 18116531520, 846914338316, 39587056212137, 1850126770689608, 86465768048368472, 4040923982272526872, 188849818269171055054, 8825754751934559124956, 412464977706204443514728
OFFSET
1,1
COMMENTS
Column 1 of A233488
FORMULA
Empirical recurrence of order 60 (see link above)
EXAMPLE
Some solutions for n=1
..1..3..3....0..2..2....1..2..1....3..2..0....1..0..0....0..1..1....3..0..0
..3..2..3....3..2..3....3..3..2....1..1..1....0..0..0....0..0..2....2..2..2
..1..1..2....1..0..1....2..2..1....1..3..0....3..2..1....3..0..0....2..0..1
CROSSREFS
Sequence in context: A221742 A239789 A233488 * A251117 A076814 A204792
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 11 2013
STATUS
approved