A198537 Number of 2nX6 0..4 arrays with values 0..4 introduced in row major order and each element equal to an even number of horizontal and vertical neighbors.

67442, 163506788110, 397739142470871040, 967523967174230258261646, 2353559236762243709633958950262

Offset

1,1

Comments

Column 3 of A198538.

Links

Table of n, a(n) for n=1..5.

Example

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

Crossrefs

Sequence in context: A251849 A359334 A226529 * A249208 A234120 A101697

Adjacent sequences: A198534 A198535 A198536 * A198538 A198539 A198540

Keyword

nonn,more

Author

R. H. Hardin, Oct 26 2011

Status

approved