A183994 Number of (n+1)X(n+1) 0..2 arrays with all 2X2 subblock sums the same

81, 309, 977, 3309, 10449, 35565, 118097, 418461, 1476081, 5460909

Offset

1,1

Comments

Diagonal of A184003

Links

Table of n, a(n) for n=1..10.

Example

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

Crossrefs

Sequence in context: A206678 A237463 A237456 * A237703 A237696 A237557

Adjacent sequences: A183991 A183992 A183993 * A183995 A183996 A183997

Keyword

nonn

Author

R. H. Hardin Jan 08 2011

Status

approved