A185924 Number of (n+1)X(n+1) 0..3 arrays with no 2X2 subblock trace equal to any horizontal or vertical neighbor 2X2 subblock trace

256, 130944, 590014464, 23071825269024, 7847745868957709536, 23221991267256751327588320, 597768284764394563452665098460064

Offset

1,1

Comments

Diagonal of A185933

Links

Table of n, a(n) for n=1..7.

Example

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

Crossrefs

Sequence in context: A236941 A222141 A333585 * A013997 A118056 A185563

Adjacent sequences: A185921 A185922 A185923 * A185925 A185926 A185927

Keyword

nonn

Author

R. H. Hardin Feb 06 2011

Status

approved