A236887 Number of (n+1)X(2+1) 0..2 arrays with the maximum plus the upper median minus the lower median minus the minimum of every 2X2 subblock equal

245, 975, 4129, 19005, 91617, 464737, 2442897, 13272897, 73869017, 419482609, 2416657937, 14082031833, 82711630513, 488789176177, 2900660394265, 17268508407633, 103027230851025, 615687930858265, 3683409663312753

Offset

1,1

Comments

Column 2 of A236893

Links

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

Formula

Empirical: a(n) = 14*a(n-1) -36*a(n-2) -311*a(n-3) +1782*a(n-4) -328*a(n-5) -15312*a(n-6) +26368*a(n-7) +28560*a(n-8) -103120*a(n-9) +42336*a(n-10) +79216*a(n-11) -66656*a(n-12) -8256*a(n-13) +20352*a(n-14) -4608*a(n-15)

Example

Some solutions for n=5
..1..0..1....1..0..1....0..2..1....1..2..1....1..2..1....0..0..0....1..0..1
..1..0..1....0..1..0....2..2..1....0..1..0....2..1..2....0..1..0....1..0..1
..0..1..0....0..1..0....2..0..1....0..1..2....0..1..0....1..1..1....2..1..2
..1..2..1....1..0..1....0..0..1....1..2..1....0..1..0....1..0..1....2..1..0
..1..2..1....1..0..1....0..2..1....2..1..2....2..1..0....1..1..1....0..1..0
..1..2..1....0..1..0....1..1..0....0..1..2....0..1..0....0..1..0....2..1..0

Crossrefs

Sequence in context: A188239 A132830 A350421 * A237161 A056264 A154080

Adjacent sequences: A236884 A236885 A236886 * A236888 A236889 A236890

Keyword

nonn

Author

R. H. Hardin, Feb 01 2014

Status

approved