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A239173
Number of (n+1)X(3+1) 0..2 arrays with no element greater than all horizontal neighbors or equal to all vertical neighbors
1
98, 514, 9604, 130890, 1876940, 26726740, 381984614, 5442841504, 77654661978, 1107987680604, 15802237635146, 225425167338190, 3215775310811444, 45870835552152286, 654345984389717822, 9334191267457643510
OFFSET
1,1
COMMENTS
Column 3 of A239178
FORMULA
Empirical recurrence of order 67 (see link above)
EXAMPLE
Some solutions for n=4
..2..2..2..2....1..1..1..1....1..1..1..0....0..1..1..0....0..2..2..1
..0..1..1..0....2..2..2..0....0..0..2..2....2..2..2..2....1..1..1..0
..1..1..0..0....1..2..2..0....2..2..2..0....1..1..1..0....0..2..2..1
..0..0..2..2....0..0..1..1....2..2..1..1....1..2..2..2....2..2..1..0
..2..2..1..1....1..1..0..0....0..0..0..0....0..1..1..0....0..0..2..2
CROSSREFS
Sequence in context: A071319 A263040 A263033 * A233928 A233921 A203083
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 11 2014
STATUS
approved