A222745 Number of nX6 0..3 arrays with exactly floor(nX6/2) elements equal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order

20, 124363, 390671426, 1324592085403, 4561749544590552, 15963407786015038880, 56492251689699683827362, 201649939061310379365131228, 724681951179540583025763617562, 2618574920088290586180901100357966

Offset

1,1

Comments

Column 6 of A222747

Links

R. H. Hardin, Table of n, a(n) for n = 1..27

Example

Some solutions for n=3
..0..0..0..0..1..0....0..0..0..0..0..0....0..0..0..0..0..1....0..0..0..0..1..0
..0..0..1..0..2..1....0..0..1..2..0..1....0..0..1..2..0..1....0..0..1..0..2..0
..3..1..1..3..2..0....1..3..0..2..3..1....2..3..0..2..1..3....2..3..0..0..1..3

Crossrefs

Sequence in context: A129038 A165344 A348646 * A175853 A340167 A013766

Adjacent sequences: A222742 A222743 A222744 * A222746 A222747 A222748

Keyword

nonn

Author

R. H. Hardin Mar 04 2013

Status

approved