A237679 Number of (n+1)X(2+1) 0..2 arrays colored with the upper median plus the lower median minus the minimum of every 2X2 subblock

474, 4146, 35620, 308814, 2688928, 23395998, 203035400, 1763640726, 15330212940, 133229902148, 1157405405328, 10056256933700, 87386040556298, 759320263256056, 6597525952465324, 57325883121376908, 498115222768298578

Offset

1,1

Comments

Column 2 of A237683

Links

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

R. H. Hardin, Empirical recurrence of order 67

Formula

Empirical recurrence of order 67 (see link above)

Example

Some solutions for n=3
..0..2..0....0..0..0....2..2..2....0..1..1....2..2..2....2..2..2....0..0..2
..2..0..0....2..2..0....0..0..2....2..0..1....1..2..2....0..0..2....0..0..2
..2..2..1....1..2..2....2..0..2....0..0..1....2..1..2....0..1..1....2..1..2
..2..2..0....0..0..0....1..0..0....1..2..1....2..0..0....2..1..1....2..2..1

Crossrefs

Sequence in context: A370295 A045302 A187612 * A236776 A236636 A104649

Adjacent sequences: A237676 A237677 A237678 * A237680 A237681 A237682

Keyword

nonn

Author

R. H. Hardin, Feb 11 2014

Status

approved