Number of cycles in range [A014137(n-1)..A014138(n-1)] of permutation A089867/A089868.

A089846

Number of cycles in range [A014137(n-1)..A014138(n-1)] of permutation A089867/A089868.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =5a(4) =13a(5) =35a(6) =100a(7) =296a(8) =903a(9) =2857a(10) =9274a(11) =30852a(12) =104784a(13) =362108a(14) =1269324a(15) =4502624a(16) =16130539a(17) =58271303a(18) =212001890a(19) =776027286a(20) =2855731796

External references