A236804 Number of (n+1)X(3+1) 0..2 arrays with the maximum plus the lower median minus the upper median minus the minimum of every 2X2 subblock equal

1033, 8825, 85929, 929447, 9558409, 107087939, 1117775361, 12821027315, 135199336873, 1580326999835, 16792477473969, 199287485892947, 2129881236360889, 25583932979862059, 274630528704260481

Offset

1,1

Comments

Column 3 of A236809

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Formula

Empirical: a(n) = 24*a(n-1) -55*a(n-2) -2772*a(n-3) +26568*a(n-4) -71616*a(n-5) -74996*a(n-6) +644112*a(n-7) -762032*a(n-8) -588288*a(n-9) +1612416*a(n-10) -783360*a(n-11)

Example

Some solutions for n=3
..2..2..1..1....0..0..0..2....0..1..2..1....2..0..1..0....2..1..2..2
..2..1..1..0....0..1..0..1....0..2..2..0....1..0..2..0....0..2..2..1
..1..1..0..0....0..0..2..0....1..0..1..2....1..1..0..1....1..2..1..1
..1..0..0..1....2..1..0..1....0..2..0..2....1..2..2..0....1..1..1..0

Crossrefs

Sequence in context: A282576 A122716 A031609 * A023063 A245680 A241787

Adjacent sequences: A236801 A236802 A236803 * A236805 A236806 A236807

Keyword

nonn

Author

R. H. Hardin, Jan 31 2014

Status

approved