A280246 - cp's OEIS frontend

A280246 a(n) = Product_{d|n} psi(d), where psi(m) is the sum of totatives of m (A023896).

n	a(n)
1	1
2	1
3	3
4	4
5	10
6	18
7	21
8	64
9	81
10	200
11	55
12	1728
13	78
14	882
15	1800
16	4096
17	136
18	26244
19	171
20	64000
21	7938
22	6050
23	253
24	2654208
25	2500
26	12168
27	19683
28	592704
29	406
30	25920000
31	465
32	1048576
33	54450
34	36992
35	88200
36	544195584
37	666
38	58482
39	109512
40	327680000
41	820
42	504094752
43	903

[1, 1, 3, 4, 10, 18, 21, 64, 81, 200, 55, 1728, 78, 882, 1800, 4096, 136, 26244, 171, 64000, 7938, 6050, 253, 2654208, 2500, 12168, 19683, 592704, 406, 25920000, 465, 1048576, 54450, 36992, 88200, 544195584, 666, 58482, 109512, 327680000, 820, 504094752, 903]

cp's OEIS Frontend

A280246 a(n) = Product_{d|n} psi(d), where psi(m) is the sum of totatives of m (A023896).

Table of values

List of values