A183833 Number of (n+1)X7 0..2 arrays with each element of every 2X2 subblock being the sum mod 3 of two others.

39367, 1598975, 63219545, 2720843743, 113949885751, 4948592709925, 211222113324755, 9166454488125047, 393994701809791089, 17069756266936509875, 735796566828393571647, 31840766923896702379165

Offset

1,1

Comments

Column 6 of A183836

Links

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

Example

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

Crossrefs

Sequence in context: A144306 A234033 A253940 * A203875 A252604 A340062

Adjacent sequences: A183830 A183831 A183832 * A183834 A183835 A183836

Keyword

nonn

Author

R. H. Hardin, Jan 07 2011

Status

approved