A186137 Number of (n+1) X 6 0..2 arrays with no 2 X 2 subblock trace equal to any horizontal or vertical neighbor 2 X 2 subblock trace.

187704, 21216780, 2513594016, 296649133848, 35143110551556, 4163686846399494, 493359058239095898, 58456633907530057662, 6926519345320270001520, 820714863561408296836038, 97245970628884382202256854

Offset

1,1

Comments

Column 5 of A186141.

Links

R. H. Hardin, Table of n, a(n) for n = 1..200

Example

Some solutions for 3 X 6
..0..0..1..2..2..2....0..0..0..0..1..0....0..0..1..1..2..2....0..0..2..1..1..1
..0..1..0..2..2..0....0..1..0..1..0..0....0..1..2..2..0..0....0..0..1..1..1..0
..0..0..2..0..0..1....0..2..0..2..2..0....0..0..0..0..2..0....0..1..0..1..0..1

Crossrefs

Cf. A186141.

Sequence in context: A251798 A253486 A253481 * A233715 A110069 A006028

Adjacent sequences: A186134 A186135 A186136 * A186138 A186139 A186140

Keyword

nonn

Author

R. H. Hardin, Feb 13 2011

Status

approved