A223469 Number of nX3 0..2 arrays with no more than floor(nX3/2) elements equal to at least one king-move neighbor, with new values introduced in row major 0..2 order

2, 18, 49, 522, 883, 12859, 20377, 327082, 517062, 8613707, 13654412, 232128995, 368736563, 6353014689, 10105994483, 175801614242, 279936196941, 4905331076864, 7816872356924, 137760977522959, 219658300762477

Offset

1,1

Comments

Column 3 of A223473

Links

R. H. Hardin, Table of n, a(n) for n = 1..189

Example

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

Crossrefs

Sequence in context: A139268 A052681 A208652 * A048910 A356712 A077591

Adjacent sequences: A223466 A223467 A223468 * A223470 A223471 A223472

Keyword

nonn

Author

R. H. Hardin Mar 20 2013

Status

approved