Number of zero-entropy permutations of length n.

A006948

Number of zero-entropy permutations of length n.

Terms

    a(0) =1a(1) =2a(2) =4a(3) =12a(4) =30a(5) =90a(6) =244a(7) =776a(8) =2218a(9) =6946a(10) =20468

External references