Number of permutations of [n] having five 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.

A346320

Number of permutations of [n] having five 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) =15a(2) =175a(3) =1820a(4) =17913a(5) =171465a(6) =1619090a(7) =15203100a(8) =142623624a(9) =1340443104a(10) =12641487040a(11) =119734858880

External references