A234132 Number of (n+1)X(n+1) 0..3 arrays with every 2X2 subblock having the sum of the absolute values of all six edge and diagonal differences equal to 9

32, 152, 488, 1640, 4904, 16424, 53288, 189992, 673832, 2532392, 9515048, 36874280, 142925864, 562745384, 2215886888

Offset

1,1

Comments

Diagonal of A234140

Links

Table of n, a(n) for n=1..15.

Example

Some solutions for n=5
..3..3..3..3..3..3....0..0..3..3..0..0....0..3..0..3..0..3....1..3..1..3..1..3
..3..0..3..0..3..0....3..0..0..3..3..0....3..3..3..3..3..3....0..1..0..1..0..1
..3..3..3..3..3..3....0..0..3..3..0..0....3..0..3..0..3..0....1..3..1..3..1..3
..0..3..0..3..0..3....3..0..0..3..3..0....1..1..1..1..1..1....0..1..0..1..0..1
..0..0..0..0..0..0....0..0..3..3..0..0....3..0..3..0..3..0....3..1..3..1..3..1
..3..0..3..0..3..0....3..0..0..3..3..0....3..3..3..3..3..3....0..1..0..1..0..1

Crossrefs

Sequence in context: A234874 A220975 A100172 * A203557 A124998 A126419

Adjacent sequences: A234129 A234130 A234131 * A234133 A234134 A234135

Keyword

nonn

Author

R. H. Hardin, Dec 19 2013

Status

approved