A206236 Number of (n+1)X7 0..3 arrays with every 2X3 or 3X2 subblock having exactly two equal edges, and new values 0..3 introduced in row major order.

51066, 170728, 607008, 9042600, 118573968, 1448239080, 22535636736, 303011941944, 3712941210144, 57939122017416, 779043702707184, 9545971851249384, 148961482706745696, 2002921359660139224

Offset: 1

Author

R. H. Hardin Feb 05 2012

Keywords

• nonn

Comments

Column 6 of A206238

Examples

			Some solutions for n=4
..0..0..1..0..0..1..0....0..0..1..0..0..1..0....0..0..1..0..0..1..2
..0..2..0..0..2..0..0....1..0..0..1..0..0..1....0..1..0..0..3..2..2
..1..0..0..2..0..0..2....2..3..0..0..1..0..0....2..0..0..3..2..2..1
..0..0..1..0..0..3..1....2..2..1..0..0..1..1....0..0..1..2..2..3..0
..3..3..0..0..2..1..1....3..2..2..3..0..1..2....3..3..2..2..3..0..0
		

Links

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

Formula

Empirical: a(n) = a(n-1) +2571*a(n-3) -2571*a(n-4) for n>10