Number of permutations of [n] having no cycle with 2 alternating runs (it is assumed that the smallest element of the cycle is in the first position).

A187245

Number of permutations of [n] having no cycle with 2 alternating runs (it is assumed that the smallest element of the cycle is in the first position).

Terms

    a(0) =1a(1) =1a(2) =2a(3) =5a(4) =17a(5) =78a(6) =463a(7) =3315a(8) =27164a(9) =247975a(10) =2492539a(11) =27422698a(12) =328607417a(13) =4266367567a(14) =59686293284a(15) =895068242601

External references