A199035 Number of nX2 0..2 arrays with values 0..2 introduced in row major order, the number of instances of each value within one of each other, and every element equal to one or two horizontal or vertical neighbors

0, 0, 3, 12, 29, 143, 877, 3516, 8987, 81112, 342188, 667215, 7467547, 32878290, 56393050, 697859958, 3145355560, 5126416780, 66563431854, 303713138234, 484994209944, 6455395706354, 29679649731124, 47028010467376

Offset

1,3

Comments

Column 2 of A199041

Links

R. H. Hardin, Table of n, a(n) for n = 1..99

Example

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

Crossrefs

Sequence in context: A215640 A104353 A001860 * A101459 A051408 A331080

Adjacent sequences: A199032 A199033 A199034 * A199036 A199037 A199038

Keyword

nonn

Author

R. H. Hardin Nov 02 2011

Status

approved