A199147 Number of nX6 0..3 arrays with values 0..3 introduced in row major order and each element equal to one or two horizontal and vertical neighbors

6, 2539, 794416, 316561994, 117380324984, 44832664800117, 16925667317073175

Offset

1,1

Comments

Column 6 of A199149

Links

Table of n, a(n) for n=1..7.

Example

Some solutions for n=3
..0..1..1..1..1..2....0..0..1..2..3..3....0..1..0..0..2..2....0..0..1..1..1..2
..0..1..0..2..1..2....0..1..1..2..0..3....0..1..1..0..2..2....1..1..3..3..0..2
..0..1..0..2..1..1....0..0..0..0..0..3....0..0..1..3..3..3....1..1..0..0..0..2

Crossrefs

Sequence in context: A264801 A067630 A181700 * A097871 A210004 A198667

Adjacent sequences: A199144 A199145 A199146 * A199148 A199149 A199150

Keyword

nonn

Author

R. H. Hardin Nov 03 2011

Status

approved