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A238174
Number of (n+1)X(2+1) 0..2 arrays with the maximum plus the minimum of every 2X2 subblock equal
1
423, 5321, 69023, 938601, 12951743, 180345769, 2520461647, 35289713177, 494500172559, 6931846504281, 97186455651295, 1362689160952841, 19107483153243615, 267927527528514313, 3756941779561193327
OFFSET
1,1
COMMENTS
Column 2 of A238180
LINKS
FORMULA
Empirical: a(n) = 22*a(n-1) -111*a(n-2) -106*a(n-3) +1473*a(n-4) -2198*a(n-5) -121*a(n-6) +1514*a(n-7) -472*a(n-8)
EXAMPLE
Some solutions for n=3
..1..0..0....0..2..0....1..1..0....1..0..0....0..2..2....0..2..1....0..0..0
..2..1..2....2..0..1....0..2..2....0..2..2....0..0..2....0..0..2....1..2..2
..1..0..2....2..2..0....1..1..0....0..0..2....1..2..0....2..2..1....2..0..2
..2..2..2....0..1..0....2..0..2....0..2..1....2..0..0....0..0..2....0..0..1
CROSSREFS
Sequence in context: A206662 A205831 A206408 * A251013 A230678 A091293
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 19 2014
STATUS
approved