A199520 Number of nX5 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 two or fewer horizontal or vertical neighbors.

10, 6300, 2513869, 425836476, 1036302685728, 1049206835165446, 506637005741617919

Offset

1,1

Comments

Column 5 of A199523

Links

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

Example

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

Crossrefs

Sequence in context: A379744 A117803 A356041 * A384207 A169621 A121787

Adjacent sequences: A199517 A199518 A199519 * A199521 A199522 A199523

Keyword

nonn

Author

R. H. Hardin, Nov 07 2011

Status

approved