Number of permutations of [n] having three cycles of the form (c1, c2, ..., c_m) where c1 = min_{i>=1} c_i and c_j = min_{i>=j} c_i or c_j = max_{i>=j} c_i.

A346318

Number of permutations of [n] having three cycles of the form (c1, c2, ..., c_m) where c1 = min_{i>=1} c_i and c_j = min_{i>=j} c_i or c_j = max_{i>=j} c_i.

Terms

    a(0) =1a(1) =6a(2) =35a(3) =195a(4) =1078a(5) =5992a(6) =33632a(7) =190800a(8) =1093664a(9) =6327552a(10) =36904192a(11) =216676096a(12) =1279012352a(13) =7581628416a(14) =45086720000a(15) =268774576128

External references