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A350614
Number of solutions to the Xqueens problem on a 2n X 2n board that are both sparse and paired.
3
0, 140, 317544, 54472800228
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OFFSET
1,2
LINKS
Table of n, a(n) for n=1..4.
Don Knuth,
Xqueens and Xqueenons
, 2021.
CROSSREFS
Cf.
A350611
-
A350613
.
Sequence in context:
A211420
A185402
A216729
*
A058939
A214376
A165600
Adjacent sequences:
A350611
A350612
A350613
*
A350615
A350616
A350617
KEYWORD
nonn
,
more
AUTHOR
Don Knuth
, Jan 16 2022
STATUS
approved
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Last modified September 6 22:26 EDT 2024. Contains 375728 sequences. (Running on oeis4.)