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A233001
a(n) = A005271(n)^2.
0
1, 4, 81, 73984, 347138964225, 266749070875738835911704576, 153420859074097275505001068428834200016791982521508695409921
OFFSET
1,2
LINKS
Daryl DeFord, Seating rearrangements on arbitrary graphs, Involve, Vol. 7 (2014), No. 6, 787-805. See Table 3.
CROSSREFS
Cf. A005271.
Sequence in context: A357513 A090599 A133396 * A357781 A318868 A289224
KEYWORD
nonn,more,hard
AUTHOR
N. J. A. Sloane, Dec 17 2013
STATUS
approved