A353692 - cp's OEIS frontend

A353692 a(n) is the least number k > n such that uh(k)/uh(n) is an integer, where uh(n) is the harmonic mean of the unitary divisors of n, or -1 if no such k exists.

n	a(n)
1	6
2	20
3	45
4	72
5	30
6	60
7	42
8	272
9	756
10	120
11	66
12	18
13	78
14	140
15	1890
16	720
17	102
18	180
19	114
20	24
21	315
22	220
23	138
24	360
25	150
26	260
27	3321
28	504
29	174
30	7560
31	186
32	1440
33	495
34	340
35	210
36	52416
37	222
38	380
39	585
40	1360
41	246
42	420
43	258
44	792
45	1512
46	460
47	282
48	720
49	294
50	600
51	765
52	936
53	318

[6, 20, 45, 72, 30, 60, 42, 272, 756, 120, 66, 18, 78, 140, 1890, 720, 102, 180, 114, 24, 315, 220, 138, 360, 150, 260, 3321, 504, 174, 7560, 186, 1440, 495, 340, 210, 52416, 222, 380, 585, 1360, 246, 420, 258, 792, 1512, 460, 282, 720, 294, 600, 765, 936, 318]

cp's OEIS Frontend

A353692 a(n) is the least number k > n such that uh(k)/uh(n) is an integer, where uh(n) is the harmonic mean of the unitary divisors of n, or -1 if no such k exists.

Table of values

List of values