login
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
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
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
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 11 2013
STATUS
approved