A222516 Number of nX2 0..3 arrays with exactly floor(nX2/2) elements unequal to at least one king-move neighbor, with new values introduced in row major 0..3 order

0, 0, 0, 9, 0, 114, 0, 1881, 0, 33828, 0, 624019, 0, 11640594, 0, 218436985, 0, 4115818812, 0, 77807963106, 0, 1475137178140, 0, 28037418382435, 0, 534101042736588, 0, 10195012207704303, 0, 194958882346128666, 0

Offset

1,4

Comments

Column 2 of A222522

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

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

Crossrefs

Sequence in context: A167319 A231948 A222396 * A057403 A339488 A157309

Adjacent sequences: A222513 A222514 A222515 * A222517 A222518 A222519

Keyword

nonn

Author

R. H. Hardin Feb 23 2013

Status

approved