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A238510
Number of (n+1)X(1+1) 0..3 arrays with no element equal to all horizontal neighbors or equal to all vertical neighbors, and new values 0..3 introduced in row major order
1
4, 25, 295, 3113, 33837, 365740, 3958594, 42834071, 463516595, 5015744275, 54275869563, 587324222844, 6355490845488, 68773364113485, 744203045653967, 8053091185427477, 87143257529984401, 942985390024669100
OFFSET
1,1
COMMENTS
Column 1 of A238515
LINKS
FORMULA
Empirical: a(n) = 10*a(n-1) +13*a(n-2) -44*a(n-3) -7*a(n-4) +14*a(n-5)
EXAMPLE
Some solutions for n=5
..0..1....0..1....0..1....0..1....0..1....0..1....0..1....0..1....0..1....0..1
..1..2....2..3....1..2....2..3....1..2....2..3....1..2....1..2....2..3....1..2
..1..3....1..3....1..0....2..0....1..3....1..2....1..3....3..2....3..0....0..1
..3..2....3..2....3..0....0..2....3..1....0..1....3..0....1..0....0..1....3..0
..1..3....2..3....1..2....3..1....2..0....3..0....1..0....0..3....3..0....2..0
..2..0....0..2....2..3....0..3....1..2....0..1....3..2....3..0....0..3....1..3
CROSSREFS
Sequence in context: A352859 A374851 A350585 * A222982 A259591 A093959
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 27 2014
STATUS
approved