A199091 Number of n X 8 0..3 arrays with values 0..3 introduced in row major order, the number of instances of each value within one of each other, and every element equal to exactly one horizontal or vertical neighbor.

1, 709, 24353, 5471810, 349276385, 59171718202

Offset

1,2

Comments

Column 8 of A199092.

Links

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

Example

Some solutions for 3 X 8
..0..0..1..1..2..3..3..2....0..0..1..1..2..2..3..3....0..0..1..1..0..0..1..1
..1..2..2..3..2..1..1..2....1..1..0..3..1..0..0..2....1..1..2..2..3..3..2..2
..1..0..0..3..0..0..3..3....2..2..0..3..1..3..3..2....0..0..3..3..2..2..3..3

Crossrefs

Cf. A199092.

Sequence in context: A059312 A114923 A057849 * A058324 A251290 A232836

Adjacent sequences: A199088 A199089 A199090 * A199092 A199093 A199094

Keyword

nonn

Author

R. H. Hardin, Nov 02 2011

Status

approved