A268181 Number of 3Xn 0..n arrays with every repeated value in every row equal to, and in every column unequal to, the previous repeated value, and new values introduced in row-major sequential order.

3, 96, 9054, 1589578, 479973420, 225814538887, 153953047945654, 144125445548106706, 177859506524316980568, 280296331296968179117250

Offset

1,1

Comments

Row 3 of A268180.

Links

Table of n, a(n) for n=1..10.

Example

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

Crossrefs

Cf. A268180.

Sequence in context: A300609 A301351 A268012 * A030262 A107173 A100494

Adjacent sequences: A268178 A268179 A268180 * A268182 A268183 A268184

Keyword

nonn

Author

R. H. Hardin, Jan 28 2016

Status

approved