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A350613 Number of paired solutions to the Xqueens problem on a 2n X 2n board. 1

%I

%S 4,528,3938208

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

%H Don Knuth, <a href="http://cs.stanford.edu/~knuth/papers/Xqueens-and-Xqueenons.pdf">Xqueens and Xqueenons</a>, 2021.

%Y Cf. A350611-A350614.

%K nonn,more

%O 1,1

%A _Don Knuth_, Jan 16 2022

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Last modified September 27 07:17 EDT 2022. Contains 357052 sequences. (Running on oeis4.)