A210010 Number of (n+1)X7 0..2 arrays containing all values 0..2 with every 2X2 subblock having two or three distinct values, and new values 0..2 introduced in row major order

640495, 1155440875, 2070471867089, 3709556186877991, 6646136755091102809, 11907389873495805482147, 21333585909890026502784395, 38221801163314869070882625309, 68479161927863057179564432736483

Offset

1,1

Comments

Column 6 of A210012

Links

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

Example

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

Crossrefs

Sequence in context: A236996 A250884 A190574 * A179576 A089220 A052243

Adjacent sequences: A210007 A210008 A210009 * A210011 A210012 A210013

Keyword

nonn

Author

R. H. Hardin Mar 16 2012

Status

approved