A222401 Number of nX7 0..2 arrays with exactly floor(nX7/2) elements unequal to at least one king-move neighbor, with new values introduced in row major 0..2 order.

10, 0, 900, 55761, 540642, 26513524, 506779353, 31162236755, 679517719195, 54519194910332, 1375249753193475, 116340653863159429, 3008912060926642354, 258941028894943230728, 6792476372711827347246, 585337079981145839216504

Offset

1,1

Comments

Column 7 of A222402

Links

R. H. Hardin, Table of n, a(n) for n = 1..19

Example

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

Crossrefs

Sequence in context: A216797 A221305 A173775 * A287465 A288013 A288436

Adjacent sequences: A222398 A222399 A222400 * A222402 A222403 A222404

Keyword

nonn

Author

R. H. Hardin, Feb 18 2013

Status

approved