A223007 Number of nX3 0..1 arrays with no more than floor(nX3/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..1 order

1, 7, 24, 169, 557, 4108, 14040, 104533, 365722, 2734747, 9710957, 72847186, 261226274, 1964845906, 7094565566, 53482760485, 194106792191, 1466023062226, 5342045681862, 40409217721285, 147724548119380, 1118883744204523

Offset

1,2

Comments

Column 3 of A223012

Links

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

Example

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

Crossrefs

Sequence in context: A153577 A009643 A108095 * A009646 A293489 A009650

Adjacent sequences: A223004 A223005 A223006 * A223008 A223009 A223010

Keyword

nonn

Author

R. H. Hardin Mar 11 2013

Status

approved