A345342 - cp's OEIS frontend

A345342 Number of permutations of [2n] having n 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.

n	a(n)
0	1
1	1
2	11
3	195
4	5033
5	171465
6	7264499
7	368258891
8	21740278417
9	1465044247953
10	110975742044635
11	9334724676616339
12	863320991981279033
13	87072657503374176985
14	9511213780859395685955
15	1118615909510940858978075
16	140933163945864346869845025
17	18937018020284359019138011425

[1, 1, 11, 195, 5033, 171465, 7264499, 368258891, 21740278417, 1465044247953, 110975742044635, 9334724676616339, 863320991981279033, 87072657503374176985, 9511213780859395685955, 1118615909510940858978075, 140933163945864346869845025, 18937018020284359019138011425]

cp's OEIS Frontend

A345342 Number of permutations of [2n] having n 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.

Table of values

List of values