A236611 Number of (n+1)X(1+1) 0..2 arrays colored with the maximum plus the upper median of every 2X2 subblock

81, 390, 1885, 8876, 41473, 193372, 912752, 4290712, 20084444, 93983432, 442021140, 2076094832, 9730606384, 45599799840, 214146503952, 1005291748992, 4714559632016, 22107730227904, 103762018758272, 486963243432832

Offset

1,1

Comments

Column 1 of A236618

Links

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

Formula

Empirical: a(n) = 16*a(n-3) +280*a(n-4) +376*a(n-5) +932*a(n-6) +1120*a(n-7) -1456*a(n-8) -1696*a(n-9) -768*a(n-10) -1152*a(n-11) for n>13

Example

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

Crossrefs

Sequence in context: A237108 A237101 A236618 * A236719 A236712 A206542

Adjacent sequences: A236608 A236609 A236610 * A236612 A236613 A236614

Keyword

nonn

Author

R. H. Hardin, Jan 29 2014

Status

approved