A209591 Number of n X n 0..6 arrays with every element equal to a diagonal or antidiagonal reflection

7, 2401, 1529437, 47738317081, 2767247026234327, 7860041410116536427241, 41461694858240499304086993277, 10716805483614568896270487886484563281, 5144331626584186407654932265866559478676249287

Offset

1,1

Comments

Column 6 of A209593

Links

R. H. Hardin, Table of n, a(n) for n = 1..30

Formula

a(n) = 7 ^ (2*n-(n modulo 2)) * 91 ^ ((n*n-2*n+(n modulo 2))/4)

Example

Some solutions for n=3
..0..5..4....0..0..4....0..6..2....0..6..5....0..3..3....0..3..5....0..3..5
..5..2..1....0..3..2....6..0..2....5..2..6....3..5..0....2..2..3....3..5..5
..1..1..3....3..2..5....1..2..1....4..5..3....5..0..1....4..2..0....3..5..3

Crossrefs

Sequence in context: A065505 A067511 A013740 * A060759 A067504 A203382

Adjacent sequences: A209588 A209589 A209590 * A209592 A209593 A209594

Keyword

nonn

Author

R. H. Hardin Mar 10 2012

Status

approved