A332778 - cp's OEIS frontend

A332778 a(1) = 1; a(n) = Sum_{d|n, d < n} phi(n/d) * a(d)^2.

n	a(n)
1	1
2	1
3	2
4	3
5	4
6	8
7	6
8	15
9	14
10	24
11	10
12	96
13	12
14	48
15	56
16	255
17	16
18	344
19	18
20	656
21	108
22	120
23	22
24	9840
25	84
26	168
27	434
28	2448
29	28
30	4608
31	30
32	65535
33	260
34	288
35	264
36	137376
37	36
38	360
39	360
40	432512
41	40
42	16776
43	42
44	14720
45	7208
46	528
47	46
48	96974880
49	258
50	9464
51	608
52	28656
53	52
54	425864
55	600

[1, 1, 2, 3, 4, 8, 6, 15, 14, 24, 10, 96, 12, 48, 56, 255, 16, 344, 18, 656, 108, 120, 22, 9840, 84, 168, 434, 2448, 28, 4608, 30, 65535, 260, 288, 264, 137376, 36, 360, 360, 432512, 40, 16776, 42, 14720, 7208, 528, 46, 96974880, 258, 9464, 608, 28656, 52, 425864, 600]

cp's OEIS Frontend

A332778 a(1) = 1; a(n) = Sum_{d|n, d < n} phi(n/d) * a(d)^2.

Table of values

List of values