A334517 - OEIS

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A334517

Number of n X n whirlpool permutations (see A334518).

3

1, 8, 5904, 2456909824, 2179875344187129600

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

LINKS

Table of n, a(n) for n=1..5.

D. E. Knuth, Whirlpool Permutations, May 05 2020

CROSSREFS

Cf. A000142 (1Xn), A261683 (2Xn), A334516 (3Xn), A334518 and A334519 (mXn).

Sequence in context: A317732 A179151 A079189 * A278384 A114133 A221233

Adjacent sequences: A334514 A334515 A334516 * A334518 A334519 A334520

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, May 06 2020

STATUS

approved