A204072 Number of (n+1)X5 0..2 arrays with every 2X2 subblock having equal diagonal elements or equal antidiagonal elements, and new values 0..2 introduced in row major order.

938, 25277, 706454, 19934369, 563880962, 15960507749, 451830740558, 12791537916233, 362138172985082, 10252434870775373, 290255213590923014, 8217375177569472881, 232640981675680448882, 6586267002045127095221

Offset: 1

Author

R. H. Hardin Jan 10 2012

Keywords

• nonn

Comments

Column 4 of A204076

Examples

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

Links

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

Formula

Empirical: a(n) = 32*a(n-1) -55*a(n-2) -1588*a(n-3) +5428*a(n-4) -2664*a(n-5) -3936*a(n-6) +3040*a(n-7) -256*a(n-8)