A222850 Number of nX3 0..2 arrays with no more than floor(nX3/2) elements equal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..2 order

2, 51, 737, 19446, 292257, 7998180, 124148448, 3439829096, 54306296841, 1515901033301, 24205923008005, 678825974471631, 10927863709310867, 307435863252751539, 4979572918586911445, 140414743437294171876

Offset

1,1

Comments

Column 3 of A222853

Links

R. H. Hardin, Table of n, a(n) for n = 1..112

Example

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

Crossrefs

Sequence in context: A180110 A037058 A106042 * A089304 A210907 A099368

Adjacent sequences: A222847 A222848 A222849 * A222851 A222852 A222853

Keyword

nonn

Author

R. H. Hardin Mar 07 2013

Status

approved