A237386 Number of (n+1)X(2+1) 0..2 arrays colored with the maximum plus the upper median minus the minimum of every 2X2 subblock.

434, 3240, 24340, 183764, 1379886, 10406596, 78612538, 593121116, 4469323758, 33698637958, 254212599808, 1917348305880, 14457809113682, 109028076862576, 822269791408032, 6201236835251186, 46765472722995182, 352677245924001228

Offset: 1

Author

R. H. Hardin, Feb 07 2014

Keywords

• nonn

Comments

Column 2 of A237391

Examples

			Some solutions for n=4
..0..0..0....0..2..2....0..2..2....1..1..1....0..2..2....0..2..2....0..2..1
..2..1..1....1..1..0....1..1..0....0..0..2....2..1..2....0..2..2....0..0..0
..1..1..1....0..0..0....1..0..0....0..0..2....1..2..0....0..0..0....0..0..2
..1..1..2....0..1..2....0..0..0....0..1..1....1..1..1....1..0..0....2..0..1
..0..2..0....2..1..1....2..1..0....2..1..0....1..1..2....1..2..2....1..1..0
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210
• R. H. Hardin, Empirical recurrence of order 58

Formula

Empirical recurrence of order 58 (see link above)