A236805 Number of (n+1)X(4+1) 0..2 arrays with the maximum plus the lower median minus the upper median minus the minimum of every 2X2 subblock equal

4183, 60187, 929447, 16530709, 270610375, 5140896385, 86863046591, 1730194335025, 29809824906343, 613527734331097, 10689124490322287, 224961906203697169, 3943143681821693815, 84279362890540754665

Offset

1,1

Comments

Column 4 of A236809

Links

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

Formula

Empirical: a(n) = 36*a(n-1) +213*a(n-2) -20688*a(n-3) +159340*a(n-4) +2245440*a(n-5) -34534356*a(n-6) +121902336*a(n-7) +49292928*a(n-8) -974576448*a(n-9) +1350053568*a(n-10) +778781952*a(n-11) -2623560192*a(n-12) +1330255872*a(n-13)

Example

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

Crossrefs

Sequence in context: A050937 A135953 A290846 * A202530 A242770 A234723

Adjacent sequences: A236802 A236803 A236804 * A236806 A236807 A236808

Keyword

nonn

Author

R. H. Hardin, Jan 31 2014

Status

approved