A094590 - cp's OEIS frontend

A094590 a(1) = 1; a(n+1) = a(n) * k(n), where k(n) is the number of elements of {a(j)}, 1<=j<=n, which are <= n.

n	a(n)
1	1
2	1
3	2
4	6
5	18
6	54
7	216
8	864
9	3456
10	13824
11	55296
12	221184
13	884736
14	3538944
15	14155776
16	56623104
17	226492416
18	905969664
19	4529848320
20	22649241600
21	113246208000
22	566231040000
23	2831155200000
24	14155776000000
25	70778880000000

[1, 1, 2, 6, 18, 54, 216, 864, 3456, 13824, 55296, 221184, 884736, 3538944, 14155776, 56623104, 226492416, 905969664, 4529848320, 22649241600, 113246208000, 566231040000, 2831155200000, 14155776000000, 70778880000000]

cp's OEIS Frontend

A094590 a(1) = 1; a(n+1) = a(n) * k(n), where k(n) is the number of elements of {a(j)}, 1<=j<=n, which are <= n.

Table of values

List of values