A334516 Number of 3 X n whirlpool permutations (see A334518).

6, 84, 5904, 1064304, 402671760, 273315542400

Offset

1,1

Links

Table of n, a(n) for n=1..6.

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

Crossrefs

Cf. A000142 (1 X n), A261683 (2 X n), A334517 (n X n), A334518 and A334519 (m X n).

Sequence in context: A030031 A244961 A293455 * A331014 A295229 A330849

Adjacent sequences: A334513 A334514 A334515 * A334517 A334518 A334519

Keyword

nonn,more

Author

N. J. A. Sloane, May 06 2020

Status

approved