A006948 Number of zero-entropy permutations of length n.

1, 2, 4, 12, 30, 90, 244, 776, 2218, 6946, 20468

Offset: 1

Author

Ethan Coven (ecoven(AT)wesleyan.edu)

Keywords

• nonn
• more

References

• N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

Links

• A. Blokh, E. Coven, and L. Block, Zero Entropy Permutations, International Journal of Bifurcation and Chaos 5 (1995), 1331-1337.

Extensions

a(6) corrected and a(7)-a(11) from Sean A. Irvine, Sep 27 2017