A209595 Number of 4X4 0..n arrays with every element equal to a diagonal or antidiagonal reflection

9216, 1476225, 51380224, 791015625, 7316407296, 47738317081, 241591910400, 1007680691889, 3610000000000, 11438404249041, 32754285674496, 86161557405625, 210866643477504, 484962978515625, 1056630674292736

Offset

1,1

Comments

Row 4 of A209593

Links

R. H. Hardin, Table of n, a(n) for n = 1..50

Formula

a(n) = (n+1) ^ 8 * ((n+1)*(2*n+1)) ^ 2

Example

Some solutions for n=3
..0..0..2..3....0..0..2..0....0..0..2..2....0..0..0..0....0..0..3..3
..0..2..1..2....0..2..2..2....0..2..3..2....0..0..3..0....0..1..2..3
..2..0..0..0....3..2..0..0....0..3..1..0....2..2..3..0....1..3..2..0
..0..2..0..0....3..3..0..0....3..0..0..0....0..2..0..0....2..1..0..0

Crossrefs

Sequence in context: A234139 A175743 A204103 * A223303 A031594 A262508

Adjacent sequences: A209592 A209593 A209594 * A209596 A209597 A209598

Keyword

nonn

Author

R. H. Hardin Mar 10 2012

Status

approved