A117360 - cp's OEIS frontend

A117360 Numbers m such that m and 2*m+1 have the same number of prime factors.

n	a(n)
1	2
2	3
3	4
4	5
5	10
6	11
7	23
8	25
9	29
10	34
11	38
12	40
13	41
14	46
15	52
16	53
17	55
18	57
19	76
20	77
21	83
22	89
23	91
24	93
25	106
26	113
27	118
28	123
29	129
30	130
31	131
32	133
33	143
34	145
35	159
36	161
37	169
38	171
39	172
40	173
41	177
42	179
43	185
44	191
45	201
46	203
47	205
48	206
49	212
50	213
51	218
52	220
53	226
54	233
55	235
56	238
57	239
58	251

[2, 3, 4, 5, 10, 11, 23, 25, 29, 34, 38, 40, 41, 46, 52, 53, 55, 57, 76, 77, 83, 89, 91, 93, 106, 113, 118, 123, 129, 130, 131, 133, 143, 145, 159, 161, 169, 171, 172, 173, 177, 179, 185, 191, 201, 203, 205, 206, 212, 213, 218, 220, 226, 233, 235, 238, 239, 251]

cp's OEIS Frontend

A117360 Numbers m such that m and 2*m+1 have the same number of prime factors.

Table of values

List of values

n	a(n)
1	2
2	3
3	4
4	5
5	10
6	11
7	23
8	25
9	29
10	34
11	38
12	40
13	41
14	46
15	52
16	53
17	55
18	57
19	76
20	77
21	83
22	89
23	91
24	93
25	106
26	113
27	118
28	123
29	129
30	130
31	131
32	133
33	143
34	145
35	159
36	161
37	169
38	171
39	172
40	173
41	177
42	179
43	185
44	191
45	201
46	203
47	205
48	206
49	212
50	213
51	218
52	220
53	226
54	233
55	235
56	238
57	239
58	251

n	a(n)
1	2
2	3
3	4
4	5
5	10
6	11
7	23
8	25
9	29
10	34
11	38
12	40
13	41
14	46
15	52
16	53
17	55
18	57
19	76
20	77
21	83
22	89
23	91
24	93
25	106
26	113
27	118
28	123
29	129
30	130
31	131
32	133
33	143
34	145
35	159
36	161
37	169
38	171
39	172
40	173
41	177
42	179
43	185
44	191
45	201
46	203
47	205
48	206
49	212
50	213
51	218
52	220
53	226
54	233
55	235
56	238
57	239
58	251

n	a(n)
1	2
2	3
3	4
4	5
5	10
6	11
7	23
8	25
9	29
10	34
11	38
12	40
13	41
14	46
15	52
16	53
17	55
18	57
19	76
20	77
21	83
22	89
23	91
24	93
25	106
26	113
27	118
28	123
29	129
30	130
31	131
32	133
33	143
34	145
35	159
36	161
37	169
38	171
39	172
40	173
41	177
42	179
43	185
44	191
45	201
46	203
47	205
48	206
49	212
50	213
51	218
52	220
53	226
54	233
55	235
56	238
57	239
58	251