A222450 Number of nX2 0..1 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..1 order

0, 0, 2, 7, 10, 23, 64, 175, 400, 983, 2498, 6409, 15982, 40282, 102240, 260590, 662008, 1685764, 4301724, 10996863, 28122246, 71995471, 184507156, 473312401, 1215008846, 3121272497, 8023924572, 20640895689, 53127720534, 136821537884

Offset

1,3

Comments

Column 2 of A222456

Links

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

Example

All solutions for n=4
..0..0....0..0....0..1....0..0....0..0....0..0....0..0
..1..1....0..0....0..0....0..1....0..0....0..0....0..0
..1..1....0..1....0..0....1..1....0..0....0..0....1..1
..1..1....1..1....0..0....1..1....1..0....1..1....1..1

Crossrefs

Sequence in context: A191832 A066964 A066967 * A362683 A032007 A091295

Adjacent sequences: A222447 A222448 A222449 * A222451 A222452 A222453

Keyword

nonn

Author

R. H. Hardin Feb 20 2013

Status

approved