A199148 Number of nX7 0..3 arrays with values 0..3 introduced in row major order and each element equal to one or two horizontal and vertical neighbors

11, 16866, 14511531, 15958823113, 16158623337745, 16925667317073175

Offset

1,1

Comments

Column 7 of A199149

Links

Table of n, a(n) for n=1..6.

Example

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

Crossrefs

Sequence in context: A145526 A230220 A068647 * A248732 A252862 A232066

Adjacent sequences: A199145 A199146 A199147 * A199149 A199150 A199151

Keyword

nonn

Author

R. H. Hardin Nov 03 2011

Status

approved