A198531 Number of 2nX8 0..2 arrays with values 0..2 introduced in row major order and each element equal to exactly one horizontal or vertical neighbor

492, 74582, 12510524, 2223874372, 411119156729, 77956630302044, 15021391650662681, 2923455266600557870, 572454626428774679082, 112514115501137650870546, 22164495447174669745358050

Offset

1,1

Comments

Column 4 of A198532

Links

Table of n, a(n) for n=1..11.

Example

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

Crossrefs

Sequence in context: A234667 A231455 A007242 * A300058 A251540 A116207

Adjacent sequences: A198528 A198529 A198530 * A198532 A198533 A198534

Keyword

nonn

Author

R. H. Hardin Oct 26 2011

Status

approved