A336549 - cp's OEIS frontend

A336549 Numbers k, not powers of primes, such that A051027(k) = Product_{p^e|k} A051027(p^e). Here each p^e is the maximal power of prime p that divides k, and A051027(k) = sigma(sigma(k)).

n	a(n)
1	6
2	12
3	14
4	18
5	20
6	24
7	26
8	28
9	36
10	38
11	44
12	45
13	48
14	50
15	54
16	56
17	62
18	63
19	68
20	72
21	74
22	75
23	76
24	80
25	86
26	92
27	96
28	99
29	100
30	104
31	108
32	112
33	116
34	117
35	122
36	124
37	126
38	134
39	144
40	146
41	147
42	148
43	150
44	153
45	158
46	162
47	171
48	172
49	175
50	176
51	180
52	188
53	192
54	194
55	196
56	200
57	206
58	207
59	208
60	212
61	218
62	224
63	225
64	234
65	236
66	242
67	244
68	248
69	252
70	254

[6, 12, 14, 18, 20, 24, 26, 28, 36, 38, 44, 45, 48, 50, 54, 56, 62, 63, 68, 72, 74, 75, 76, 80, 86, 92, 96, 99, 100, 104, 108, 112, 116, 117, 122, 124, 126, 134, 144, 146, 147, 148, 150, 153, 158, 162, 171, 172, 175, 176, 180, 188, 192, 194, 196, 200, 206, 207, 208, 212, 218, 224, 225, 234, 236, 242, 244, 248, 252, 254]

cp's OEIS Frontend

A336549 Numbers k, not powers of primes, such that A051027(k) = Product_{p^e|k} A051027(p^e). Here each p^e is the maximal power of prime p that divides k, and A051027(k) = sigma(sigma(k)).

Table of values

List of values

n	a(n)
1	6
2	12
3	14
4	18
5	20
6	24
7	26
8	28
9	36
10	38
11	44
12	45
13	48
14	50
15	54
16	56
17	62
18	63
19	68
20	72
21	74
22	75
23	76
24	80
25	86
26	92
27	96
28	99
29	100
30	104
31	108
32	112
33	116
34	117
35	122
36	124
37	126
38	134
39	144
40	146
41	147
42	148
43	150
44	153
45	158
46	162
47	171
48	172
49	175
50	176
51	180
52	188
53	192
54	194
55	196
56	200
57	206
58	207
59	208
60	212
61	218
62	224
63	225
64	234
65	236
66	242
67	244
68	248
69	252
70	254

n	a(n)
1	6
2	12
3	14
4	18
5	20
6	24
7	26
8	28
9	36
10	38
11	44
12	45
13	48
14	50
15	54
16	56
17	62
18	63
19	68
20	72
21	74
22	75
23	76
24	80
25	86
26	92
27	96
28	99
29	100
30	104
31	108
32	112
33	116
34	117
35	122
36	124
37	126
38	134
39	144
40	146
41	147
42	148
43	150
44	153
45	158
46	162
47	171
48	172
49	175
50	176
51	180
52	188
53	192
54	194
55	196
56	200
57	206
58	207
59	208
60	212
61	218
62	224
63	225
64	234
65	236
66	242
67	244
68	248
69	252
70	254

n	a(n)
1	6
2	12
3	14
4	18
5	20
6	24
7	26
8	28
9	36
10	38
11	44
12	45
13	48
14	50
15	54
16	56
17	62
18	63
19	68
20	72
21	74
22	75
23	76
24	80
25	86
26	92
27	96
28	99
29	100
30	104
31	108
32	112
33	116
34	117
35	122
36	124
37	126
38	134
39	144
40	146
41	147
42	148
43	150
44	153
45	158
46	162
47	171
48	172
49	175
50	176
51	180
52	188
53	192
54	194
55	196
56	200
57	206
58	207
59	208
60	212
61	218
62	224
63	225
64	234
65	236
66	242
67	244
68	248
69	252
70	254