Number of cycles in range [A014137(n-1)..A014138(n-1)] of permutation A089865/A089866.

A089844

Number of cycles in range [A014137(n-1)..A014138(n-1)] of permutation A089865/A089866.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =4a(4) =9a(5) =23a(6) =68a(7) =205a(8) =655a(9) =2147a(10) =7218a(11) =24686a(12) =85760a(13) =301458a(14) =1070820a(15) =3836693a(16) =13851191a(17) =50333389a(18) =183965474a(19) =675825400a(20) =2494114694

External references