A199226 Number of nX4 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 zero or one horizontal or vertical neighbors

6, 148, 1114, 55956, 1167274, 9196334, 530601540, 11633434848, 92326218546, 5690918294602, 127860411550976, 1019724611977366, 65238218370369084, 1488224431249789464, 11906181377018139524, 780082724283681110224

Offset

1,1

Comments

Column 4 of A199230

Links

R. H. Hardin, Table of n, a(n) for n = 1..30

Example

Some solutions for n=5
..0..1..0..0....0..1..0..2....0..1..0..0....0..1..0..0....0..1..0..2
..1..0..2..2....0..2..1..1....0..1..2..2....1..0..2..2....0..2..2..1
..2..1..1..0....2..0..2..0....1..2..1..0....1..2..1..1....1..0..1..2
..0..0..2..2....2..1..0..1....0..2..1..0....2..0..2..0....0..2..0..2
..2..2..1..1....1..2..2..1....2..1..2..1....0..1..1..2....1..2..1..1

Crossrefs

Sequence in context: A063419 A065986 A375780 * A012791 A347842 A264645

Adjacent sequences: A199223 A199224 A199225 * A199227 A199228 A199229

Keyword

nonn

Author

R. H. Hardin Nov 04 2011

Status

approved