A222660 Number of nX2 0..3 arrays with exactly floor(nX2/2) elements unequal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..3 order

0, 0, 2, 9, 26, 103, 446, 1964, 8624, 38467, 172996, 781826, 3543506, 16101962, 73319508, 334431875, 1527675428, 6987461432, 31997430636, 146680198680, 673052434686, 3091103533619, 14208094465250, 65356612821710

Offset

1,3

Comments

Column 2 of A222666

Links

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

Example

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

Crossrefs

Sequence in context: A136429 A091469 A125670 * A182325 A008910 A239059

Adjacent sequences: A222657 A222658 A222659 * A222661 A222662 A222663

Keyword

nonn

Author

R. H. Hardin Feb 28 2013

Status

approved