A184764 Number of (n+1)X(n+1) 0..3 arrays with every 2X2 subblock singular

64, 8272, 1967440, 4975179472, 22101775999696, 1004331937875999952, 83362210743024650511568, 65871504288847215551031759568

Offset

1,1

Comments

Diagonal of A184773

Links

Table of n, a(n) for n=1..8.

Example

Some solutions for 3X3
..0..0..3....3..0..1....3..0..0....0..2..3....3..2..1....0..2..0....3..0..3
..0..0..3....3..0..3....3..0..3....0..0..0....0..0..0....0..0..0....0..0..2
..2..0..0....3..0..2....1..0..3....2..1..3....2..1..1....1..1..3....1..0..2

Crossrefs

Sequence in context: A300181 A183499 A187702 * A239647 A222140 A093264

Adjacent sequences: A184761 A184762 A184763 * A184765 A184766 A184767

Keyword

nonn

Author

R. H. Hardin Jan 21 2011

Status

approved