A268010 Number of 1Xn 0..n arrays with every repeated value in every row and column unequal to the previous repeated value, and new values introduced in row-major sequential order.

1, 2, 4, 12, 40, 154, 656, 3074, 15616, 85360, 498464, 3092450, 20286360, 140153382, 1016262080, 7710988372, 61062381784, 503482376930, 4313580705728, 38328590370762, 352618807559008, 3353663977088848, 32927374589861296

Offset

1,2

Comments

Row 1 of A268009.

Links

R. H. Hardin, Table of n, a(n) for n = 1..122

Example

Some solutions for n=8
..0..1..0..1..0..2..0..0....0..1..1..2..3..4..2..1....0..1..2..3..0..2..4..3

Crossrefs

Cf. A268009.

Sequence in context: A268953 A268954 A268955 * A215073 A215074 A215070

Adjacent sequences: A268007 A268008 A268009 * A268011 A268012 A268013

Keyword

nonn

Author

R. H. Hardin, Jan 24 2016

Status

approved