A186139 Number of (n+1) X 8 0..2 arrays with no 2 X 2 subblock trace equal to any horizontal or vertical neighbor 2 X 2 subblock trace.

9066168, 4173269994, 2044563391476, 1000411106914620, 493359058239095898, 243566994040674992586, 120347170141816347874560, 59477821878604876659005166, 29397763055311784589920812344

Offset

1,1

Comments

Column 7 of A186141.

Links

R. H. Hardin, Table of n, a(n) for n = 1..14

Example

Some solutions for 3 X 8
..0..0..0..0..0..1..0..1....0..0..0..0..2..0..2..0....0..0..0..0..1..0..2..1
..0..0..1..0..2..0..2..1....0..0..1..0..1..1..1..2....0..0..1..0..1..1..0..1
..0..1..0..1..1..0..0..2....0..1..0..2..0..0..2..1....0..1..0..2..0..2..1..0

Crossrefs

Cf. A186141.

Sequence in context: A157821 A106787 A105012 * A335581 A015350 A233613

Adjacent sequences: A186136 A186137 A186138 * A186140 A186141 A186142

Keyword

nonn

Author

R. H. Hardin, Feb 13 2011

Status

approved