login
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
1
4183, 60187, 929447, 16530709, 270610375, 5140896385, 86863046591, 1730194335025, 29809824906343, 613527734331097, 10689124490322287, 224961906203697169, 3943143681821693815, 84279362890540754665
OFFSET
1,1
COMMENTS
Column 4 of A236809
LINKS
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
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 31 2014
STATUS
approved