Number of cycles in range [A014137(n-1)..A014138(n-1)] of permutation A089869/A089870.

A090827

Number of cycles in range [A014137(n-1)..A014138(n-1)] of permutation A089869/A089870.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =5a(4) =13a(5) =34a(6) =91a(7) =245a(8) =659a(9) =1786a(10) =4846a(11) =13182a(12) =35962a(13) =98418a(14) =270121a(15) =743533a(16) =2052073a(17) =5678238a(18) =15750382a(19) =43793198a(20) =122042214

External references