A251529 Number of ways to place any number of black and any number of white nonattacking knights on a (n+2)X(4+2) board

3222565, 216137483, 17145057973, 1212903660581, 85453027245665, 6219630222384685, 454299179677008977, 33096333812202713141, 2417309215420079989015, 176914291529572534071801

Offset

1,1

Comments

Column 4 of A251531

Links

R. H. Hardin, Table of n, a(n) for n = 1..63

Example

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

Crossrefs

Sequence in context: A223484 A029820 A146976 * A209715 A361613 A235211

Adjacent sequences: A251526 A251527 A251528 * A251530 A251531 A251532

Keyword

nonn

Author

R. H. Hardin, Dec 04 2014

Status

approved