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A235965
Number of (n+1)X(1+1) 0..3 arrays colored with the upper median value of each 2X2 subblock
1
256, 1964, 13194, 85476, 556486, 3614066, 23457361, 152354048, 990262160, 6430004688, 41756569624, 271256431352, 1762097787460, 11443841761376, 74329271829200, 482816708790400, 3136044047363744, 20368663950465184
OFFSET
1,1
COMMENTS
Column 1 of A235972
LINKS
FORMULA
Empirical: a(n) = 96*a(n-3) +752*a(n-4) +1456*a(n-5) +6180*a(n-6) +6848*a(n-7) +13712*a(n-8) +9408*a(n-9) +12288*a(n-10) for n>13
EXAMPLE
Some solutions for n=4
..0..3....2..1....1..1....0..2....0..0....0..1....0..1....0..0....0..0....2..1
..0..2....3..0....2..3....1..3....1..2....1..2....0..0....3..0....1..2....0..0
..0..0....2..3....3..1....2..3....3..1....2..3....2..3....3..2....2..3....2..0
..2..1....0..1....2..0....1..1....0..1....3..2....3..2....1..1....0..3....1..1
..2..2....0..3....1..0....3..1....3..2....1..0....2..2....3..1....0..2....3..2
CROSSREFS
Sequence in context: A238063 A238058 A235972 * A206188 A205370 A205659
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 17 2014
STATUS
approved