A069249 - cp's OEIS frontend

A069249 a(n) = n^2 - phi(n)*sigma(n).

n	a(n)
1	0
2	1
3	1
4	2
5	1
6	12
7	1
8	4
9	3
10	28
11	1
12	32
13	1
14	52
15	33
16	8
17	1
18	90
19	1
20	64
21	57
22	124
23	1
24	96
25	5
26	172
27	9
28	112
29	1
30	324
31	1
32	16
33	129
34	292
35	73
36	204
37	1
38	364
39	177
40	160
41	1
42	612
43	1
44	256
45	153
46	532
47	1
48	320
49	7
50	640
51	297
52	352
53	1
54	756
55	145
56	256
57	369
58	844
59	1
60	912
61	1
62	964
63	225
64	32
65	193
66	1476
67	1
68	592

[0, 1, 1, 2, 1, 12, 1, 4, 3, 28, 1, 32, 1, 52, 33, 8, 1, 90, 1, 64, 57, 124, 1, 96, 5, 172, 9, 112, 1, 324, 1, 16, 129, 292, 73, 204, 1, 364, 177, 160, 1, 612, 1, 256, 153, 532, 1, 320, 7, 640, 297, 352, 1, 756, 145, 256, 369, 844, 1, 912, 1, 964, 225, 32, 193, 1476, 1, 592]

cp's OEIS Frontend

A069249 a(n) = n^2 - phi(n)*sigma(n).

Table of values

List of values