Number of cycles in range [A014137(n-1)..A014138(n-1)] of permutation A073286/A073287.

A089404

Number of cycles in range [A014137(n-1)..A014138(n-1)] of permutation A073286/A073287.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =4a(4) =10a(5) =26a(6) =74a(7) =222a(8) =698a(9) =2264a(10) =7536a(11) =25600a(12) =88406a(13) =309440a(14) =1095354a(15) =3914340a(16) =14102324a(17) =51165004a(18) =186774368a(19) =685495334a(20) =2527957006

External references