A065150 - cp's OEIS frontend

A065150 Numbers k such that the harmonic mean of phi(k) and sigma(k) is an integer.

n	a(n)
1	1
2	12
3	15
4	35
5	56
6	78
7	95
8	140
9	143
10	172
11	190
12	248
13	264
14	287
15	315
16	319
17	323
18	357
19	418
20	477
21	588
22	594
23	675
24	812
25	814
26	840
27	899
28	910
29	1045
30	1107
31	1118
32	1131
33	1199
34	1208
35	1254
36	1349
37	1420
38	1425
39	1485
40	1495
41	1558
42	1608
43	1672
44	1763
45	2214
46	2261
47	2318
48	2337

[1, 12, 15, 35, 56, 78, 95, 140, 143, 172, 190, 248, 264, 287, 315, 319, 323, 357, 418, 477, 588, 594, 675, 812, 814, 840, 899, 910, 1045, 1107, 1118, 1131, 1199, 1208, 1254, 1349, 1420, 1425, 1485, 1495, 1558, 1608, 1672, 1763, 2214, 2261, 2318, 2337]

cp's OEIS Frontend

A065150 Numbers k such that the harmonic mean of phi(k) and sigma(k) is an integer.

Table of values

List of values