A199353 Number of nX4 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 zero or one horizontal or vertical neighbors

1, 105, 7945, 705263, 66367192, 6518500460, 661357976129, 68780790321431, 7293552029780267, 785674669296654053

Offset

1,2

Comments

Column 4 of A199356

Links

Table of n, a(n) for n=1..10.

Example

Some solutions for n=4
..0..1..0..1....0..1..0..1....0..1..0..0....0..1..0..2....0..1..0..1
..2..3..0..2....2..1..0..3....2..1..3..3....1..2..3..0....2..3..2..0
..3..1..3..2....1..3..2..3....3..3..2..1....1..3..0..1....1..0..3..2
..2..3..1..0....2..0..3..2....1..2..0..2....3..2..3..2....3..2..3..1

Crossrefs

Sequence in context: A075914 A075924 A359991 * A263888 A269474 A255497

Adjacent sequences: A199350 A199351 A199352 * A199354 A199355 A199356

Keyword

nonn

Author

R. H. Hardin Nov 05 2011

Status

approved