A235953 Number of (n+1) X (7+1) 0..2 arrays colored with the upper median value of each 2 X 2 subblock.

58896, 18468, 4884, 7320, 9260, 14440, 21288, 29328, 41748, 57760, 83202, 117312, 164264, 231040, 333776, 469248, 657056, 924160, 1335104, 1876992, 2628224, 3696640, 5340416, 7507968, 10512896, 14786560, 21361664, 30031872, 42051584, 59146240, 85446656, 120127488

Offset

1,1

Links

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

Formula

Empirical: a(n) = 4*a(n-4) for n>15.

Example

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

Crossrefs

Column 7 of A235954.

Sequence in context: A217603 A384771 A205233 * A343374 A359310 A393688

Adjacent sequences: A235950 A235951 A235952 * A235954 A235955 A235956

Keyword

nonn

Author

R. H. Hardin, Jan 17 2014

Status

approved