A350613 Number of paired solutions to the Xqueens problem on a 2n X 2n board.

4, 528, 3938208

Offset

1,1

Links

Table of n, a(n) for n=1..3.

Don Knuth, Xqueens and Xqueenons, 2021.

Crossrefs

Cf. A350611-A350614.

Sequence in context: A089668 A257922 A083284 * A152218 A152463 A295206

Adjacent sequences: A350610 A350611 A350612 * A350614 A350615 A350616

Keyword

nonn,more

Author

Don Knuth, Jan 16 2022

Status

approved