A185922 Number of (n+1)X5 0..3 arrays with no 2X2 subblock determinant equal to any horizontal or vertical neighbor 2X2 subblock determinant.

687900, 328811578, 160170012852, 77659127557452, 37582792498003078, 18206165306257082286

Offset

1,1

Comments

Column 4 of A185923

Links

Table of n, a(n) for n=1..6.

Example

Some solutions for 3X5
..0..2..3..1..2....0..2..0..1..1....0..2..1..1..2....0..2..3..0..3
..1..0..1..3..3....1..0..1..2..2....1..0..1..0..2....1..0..1..3..2
..2..2..0..1..3....0..2..3..1..0....2..2..3..2..3....0..2..3..1..0

Crossrefs

Sequence in context: A185865 A238144 A205280 * A353345 A204788 A254773

Adjacent sequences: A185919 A185920 A185921 * A185923 A185924 A185925

Keyword

nonn

Author

R. H. Hardin, Feb 06 2011

Status

approved