A222650 Number of nX1 0..3 arrays with no more than floor(nX1/2) elements equal to at least one king-move neighbor, with new values introduced in row major 0..3 order

1, 1, 2, 11, 34, 131, 438, 2150, 7676, 32491, 116096, 533186, 1945184, 8362152, 30561808, 135650378, 501075616, 2155759835, 7986345032, 34780282521, 129686419290, 555913562689, 2079094345694, 8947148045345, 33609869742022

Offset

1,3

Comments

Column 1 of A222654

Links

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

Example

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

Crossrefs

Sequence in context: A100109 A328152 A209033 * A026961 A026971 A323683

Adjacent sequences: A222647 A222648 A222649 * A222651 A222652 A222653

Keyword

nonn

Author

R. H. Hardin Feb 27 2013

Status

approved