A198530 Number of 2nX6 0..2 arrays with values 0..2 introduced in row major order and each element equal to exactly one horizontal or vertical neighbor

76, 3838, 213328, 12510524, 757941274, 46796529288, 2920541321626, 183371225099361, 11551938856624945, 729096061168837827, 46063831233179842268, 2911931787180884205541, 184135675347690092435300

Offset

1,1

Comments

Column 3 of A198532

Links

R. H. Hardin, Table of n, a(n) for n = 1..131

Example

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

Crossrefs

Sequence in context: A035804 A017739 A278685 * A234176 A116264 A324434

Adjacent sequences: A198527 A198528 A198529 * A198531 A198532 A198533

Keyword

nonn

Author

R. H. Hardin Oct 26 2011

Status

approved