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A350613 Number of paired solutions to the Xqueens problem on a 2n X 2n board. 1
4, 528, 3938208 (list; graph; refs; listen; history; text; internal format)
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

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Last modified August 17 16:12 EDT 2022. Contains 356189 sequences. (Running on oeis4.)