A215923 Number of diagonal and antidiagonal neighbor colorings of the odd squares of an nX7 array with new integer colors introduced in row major order.
5, 203, 12840, 14050312, 4044766240, 18383354944364, 12954733199158688, 152834703746357948488, 204451724239460493425216, 4971673449387903153569761420, 10980920102796579166081443367088
Offset: 1
Keywords
Examples
Some solutions for n=3 ..x..0..x..1..x..0..x....x..0..x..1..x..0..x....x..0..x..0..x..0..x ..2..x..3..x..2..x..3....1..x..2..x..3..x..1....1..x..2..x..2..x..2 ..x..4..x..1..x..5..x....x..4..x..0..x..0..x....x..0..x..1..x..1..x
Comments