A348694 - cp's OEIS frontend

A348694 a(n) is the least number k such that the numerator of the harmonic mean of the divisors of k is equal to n, or -1 if no such k exists.

n	a(n)
1	1
2	6
3	3
4	2
5	5
6	270
7	7
8	672
9	84
10	30
11	11
12	4
13	13
14	18620
15	420
16	24
17	17
18	12
19	19
20	10
21	21
22	22
23	23
24	30240
25	1550
26	78
27	9
28	168
29	29
30	60
31	31
32	8
33	132
34	102
35	35
36	18
37	37
38	38
39	39
40	3360
41	41
42	3724
43	43
44	7392
45	45
46	15456
47	47
48	1080
49	49
50	6051500
51	153
52	26
53	53
54	540
55	55
56	56
57	57
58	174
59	59
60	90

[1, 6, 3, 2, 5, 270, 7, 672, 84, 30, 11, 4, 13, 18620, 420, 24, 17, 12, 19, 10, 21, 22, 23, 30240, 1550, 78, 9, 168, 29, 60, 31, 8, 132, 102, 35, 18, 37, 38, 39, 3360, 41, 3724, 43, 7392, 45, 15456, 47, 1080, 49, 6051500, 153, 26, 53, 540, 55, 56, 57, 174, 59, 90]

cp's OEIS Frontend

A348694 a(n) is the least number k such that the numerator of the harmonic mean of the divisors of k is equal to n, or -1 if no such k exists.

Table of values

List of values