A184664 Number of (n+1)X(n+1) 0..3 arrays with no 2X2 subblock summing to less than 6

150, 67330, 266060160, 11348244616180, 4705518067315949795, 19869188673828370548366580, 837185450907978354702239657652981

Offset

1,1

Comments

Diagonal of A184673

Links

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

Example

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

Crossrefs

Sequence in context: A264324 A145631 A159737 * A068274 A068286 A115483

Adjacent sequences: A184661 A184662 A184663 * A184665 A184666 A184667

Keyword

nonn

Author

R. H. Hardin Jan 19 2011

Status

approved