A336930 - cp's OEIS frontend

A336930 Numbers k such that the 2-adic valuation of A003973(k), the sum of divisors of the prime shifted k is equal to the 2-adic valuation of the number of divisors of k.

n	a(n)
1	1
2	3
3	4
4	9
5	11
6	12
7	13
8	16
9	23
10	25
11	27
12	31
13	33
14	36
15	37
16	39
17	44
18	47
19	48
20	49
21	52
22	59
23	64
24	69
25	71
26	75
27	81
28	83
29	89
30	92
31	93
32	97
33	99
34	100
35	107
36	108
37	109
38	111
39	117
40	121
41	124
42	131
43	132
44	139
45	141
46	143
47	144
48	147
49	148
50	151
51	156
52	167
53	169
54	176
55	177
56	179
57	188
58	191
59	192
60	193
61	196
62	207
63	208
64	213
65	225
66	227
67	229
68	236
69	239
70	243
71	249
72	251

[1, 3, 4, 9, 11, 12, 13, 16, 23, 25, 27, 31, 33, 36, 37, 39, 44, 47, 48, 49, 52, 59, 64, 69, 71, 75, 81, 83, 89, 92, 93, 97, 99, 100, 107, 108, 109, 111, 117, 121, 124, 131, 132, 139, 141, 143, 144, 147, 148, 151, 156, 167, 169, 176, 177, 179, 188, 191, 192, 193, 196, 207, 208, 213, 225, 227, 229, 236, 239, 243, 249, 251]

cp's OEIS Frontend

A336930 Numbers k such that the 2-adic valuation of A003973(k), the sum of divisors of the prime shifted k is equal to the 2-adic valuation of the number of divisors of k.

Table of values

List of values

n	a(n)
1	1
2	3
3	4
4	9
5	11
6	12
7	13
8	16
9	23
10	25
11	27
12	31
13	33
14	36
15	37
16	39
17	44
18	47
19	48
20	49
21	52
22	59
23	64
24	69
25	71
26	75
27	81
28	83
29	89
30	92
31	93
32	97
33	99
34	100
35	107
36	108
37	109
38	111
39	117
40	121
41	124
42	131
43	132
44	139
45	141
46	143
47	144
48	147
49	148
50	151
51	156
52	167
53	169
54	176
55	177
56	179
57	188
58	191
59	192
60	193
61	196
62	207
63	208
64	213
65	225
66	227
67	229
68	236
69	239
70	243
71	249
72	251

n	a(n)
1	1
2	3
3	4
4	9
5	11
6	12
7	13
8	16
9	23
10	25
11	27
12	31
13	33
14	36
15	37
16	39
17	44
18	47
19	48
20	49
21	52
22	59
23	64
24	69
25	71
26	75
27	81
28	83
29	89
30	92
31	93
32	97
33	99
34	100
35	107
36	108
37	109
38	111
39	117
40	121
41	124
42	131
43	132
44	139
45	141
46	143
47	144
48	147
49	148
50	151
51	156
52	167
53	169
54	176
55	177
56	179
57	188
58	191
59	192
60	193
61	196
62	207
63	208
64	213
65	225
66	227
67	229
68	236
69	239
70	243
71	249
72	251

n	a(n)
1	1
2	3
3	4
4	9
5	11
6	12
7	13
8	16
9	23
10	25
11	27
12	31
13	33
14	36
15	37
16	39
17	44
18	47
19	48
20	49
21	52
22	59
23	64
24	69
25	71
26	75
27	81
28	83
29	89
30	92
31	93
32	97
33	99
34	100
35	107
36	108
37	109
38	111
39	117
40	121
41	124
42	131
43	132
44	139
45	141
46	143
47	144
48	147
49	148
50	151
51	156
52	167
53	169
54	176
55	177
56	179
57	188
58	191
59	192
60	193
61	196
62	207
63	208
64	213
65	225
66	227
67	229
68	236
69	239
70	243
71	249
72	251