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A253521
Number of (n+1)X(5+1) 0..2 arrays with every 2X2 subblock diagonal minimum minus antidiagonal minimum nondecreasing horizontally and diagonal maximum minus antidiagonal maximum nondecreasing vertically
1
42669, 169828, 256914, 370028, 673229, 1439791, 3429207, 8936967, 24799705, 71469938, 210239277, 624906937, 1866784570, 5589710182, 16755089278, 50247017691, 150717649463, 452123299882, 1356332753987, 4068952191477
OFFSET
1,1
COMMENTS
Column 5 of A253524
LINKS
FORMULA
Empirical: a(n) = 9*a(n-1) -33*a(n-2) +65*a(n-3) -75*a(n-4) +51*a(n-5) -19*a(n-6) +3*a(n-7) for n>15
EXAMPLE
Some solutions for n=2
..2..2..0..1..1..1....1..1..0..0..1..2....1..2..0..2..2..0....2..2..0..0..2..2
..2..1..0..0..0..0....1..0..0..0..0..0....2..2..0..1..1..0....2..2..0..0..1..1
..0..0..0..2..2..2....1..0..2..2..2..1....0..0..0..0..1..2....2..1..0..0..0..1
CROSSREFS
Sequence in context: A210264 A251245 A187959 * A254419 A254426 A147635
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 03 2015
STATUS
approved