A222504 Number of nX3 0..1 arrays with exactly floor(nX3/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..1 order

0, 4, 4, 35, 87, 496, 1335, 7552, 21382, 122942, 348597, 2045395, 5812073, 34558802, 98272393, 589386556, 1678849694, 10123122248, 28893573238, 174842616458, 500084523708, 3033764103592, 8694157659203, 52844583851218, 151707321284408

Offset

1,2

Comments

Column 3 of A222509

Links

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

Example

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

Crossrefs

Sequence in context: A189743 A089542 A222285 * A226008 A145109 A181858

Adjacent sequences: A222501 A222502 A222503 * A222505 A222506 A222507

Keyword

nonn

Author

R. H. Hardin Feb 23 2013

Status

approved