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

1,1

Comments

Column 4 of A204076

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)

Example

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

Crossrefs

Sequence in context: A207287 A176376 A031902 * A259641 A200428 A104917

Adjacent sequences: A204069 A204070 A204071 * A204073 A204074 A204075

Keyword

nonn

Author

R. H. Hardin Jan 10 2012

Status

approved