A222851 Number of nX4 0..2 arrays with no more than floor(nX4/2) elements equal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..2 order

10, 391, 19446, 1020085, 54792022, 2987881000, 164730750373, 9157731030542, 512408255461283, 28820435495127238, 1627922121827975600, 92280373332999109832, 5246771020310646443594, 299086443047065736686909

Offset

1,1

Comments

Column 4 of A222853

Links

R. H. Hardin, Table of n, a(n) for n = 1..45

Example

Some solutions for n=3
..0..1..1..2....0..1..2..0....0..1..2..0....0..0..1..0....0..1..2..0
..1..2..0..0....1..0..2..2....2..0..1..1....2..0..2..2....2..0..1..2
..0..1..0..2....2..2..1..0....1..1..2..2....0..2..0..2....2..2..1..0

Crossrefs

Sequence in context: A349480 A203774 A024136 * A013405 A013404 A013402

Adjacent sequences: A222848 A222849 A222850 * A222852 A222853 A222854

Keyword

nonn

Author

R. H. Hardin Mar 07 2013

Status

approved