A186138 Number of (n+1)X7 0..2 arrays with no 2X2 subblock trace equal to any horizontal or vertical neighbor 2X2 subblock trace

1304424, 297562572, 71683161894, 17226840778164, 4163686846399494, 1006890732907711236, 243566994040674992586, 58923376595033869477548, 14255041036793840265910500, 3448666147857395420772494514

Offset

1,1

Comments

Column 6 of A186141

Links

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

Example

Some solutions for 3X7
..0..0..0..1..0..2..0....0..0..0..0..0..1..2....0..0..0..1..1..1..2
..0..0..1..0..1..0..0....0..0..2..1..2..0..2....0..0..1..0..2..0..2
..0..1..0..0..0..2..0....0..1..0..2..0..2..2....0..1..0..0..0..2..1

Crossrefs

Sequence in context: A254194 A254187 A253799 * A066702 A261731 A141592

Adjacent sequences: A186135 A186136 A186137 * A186139 A186140 A186141

Keyword

nonn

Author

R. H. Hardin Feb 13 2011

Status

approved