A222285 Number of nX3 0..1 arrays with exactly floor(nX3/2) elements unequal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..1 order.

0, 4, 4, 35, 83, 532, 1427, 8540, 23798, 143594, 405187, 2455279, 6993039, 42590466, 121981025, 745909396, 2145554406, 13161790760, 37983541068, 233613349710, 675981684148, 4166412530876, 12082238135283, 74601934076542

Offset

1,2

Comments

Column 3 of A222290

Links

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

Example

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

Crossrefs

Sequence in context: A298681 A189743 A089542 * A222504 A226008 A145109

Adjacent sequences: A222282 A222283 A222284 * A222286 A222287 A222288

Keyword

nonn

Author

R. H. Hardin, Feb 14 2013

Status

approved