A326824 - cp's OEIS frontend

A326824 a(1) = 1; a(n) = Sum_{d|n, d < n} phi(n/d) * d * a(d).

n	a(n)
1	1
2	1
3	2
4	4
5	4
6	12
7	6
8	24
9	18
10	32
11	10
12	124
13	12
14	60
15	72
16	240
17	16
18	336
19	18
20	440
21	132
22	140
23	22
24	2088
25	100
26	192
27	378
28	1044
29	28
30	2096
31	30
32	4320
33	300
34	320
35	312
36	9636
37	36
38	396
39	408
40	10384
41	40
42	5040
43	42
44	3500
45	3000
46	572
47	46
48	61584
49	294
50	3920
51	672
52	5544
53	52
54	23148
55	680

[1, 1, 2, 4, 4, 12, 6, 24, 18, 32, 10, 124, 12, 60, 72, 240, 16, 336, 18, 440, 132, 140, 22, 2088, 100, 192, 378, 1044, 28, 2096, 30, 4320, 300, 320, 312, 9636, 36, 396, 408, 10384, 40, 5040, 42, 3500, 3000, 572, 46, 61584, 294, 3920, 672, 5544, 52, 23148, 680]

cp's OEIS Frontend

A326824 a(1) = 1; a(n) = Sum_{d|n, d < n} phi(n/d) * d * a(d).

Table of values

List of values