A259559 - cp's OEIS frontend

A259559 Numbers n such that prime(n)-1 and prime(n+1)-1 have the same number of prime factors, including repeats.

n	a(n)
1	3
2	4
3	10
4	12
5	19
6	29
7	34
8	36
9	45
10	46
11	50
12	61
13	85
14	89
15	91
16	104
17	112
18	117
19	118
20	119
21	129
22	130
23	137
24	138
25	143
26	147
27	148
28	158
29	178
30	179
31	181
32	185
33	200
34	202
35	206
36	214
37	220
38	233
39	238
40	239
41	244
42	248
43	249
44	258
45	262
46	275
47	299
48	304
49	314
50	333
51	338
52	340

[3, 4, 10, 12, 19, 29, 34, 36, 45, 46, 50, 61, 85, 89, 91, 104, 112, 117, 118, 119, 129, 130, 137, 138, 143, 147, 148, 158, 178, 179, 181, 185, 200, 202, 206, 214, 220, 233, 238, 239, 244, 248, 249, 258, 262, 275, 299, 304, 314, 333, 338, 340]

cp's OEIS Frontend

A259559 Numbers n such that prime(n)-1 and prime(n+1)-1 have the same number of prime factors, including repeats.

Table of values

List of values

n	a(n)
1	3
2	4
3	10
4	12
5	19
6	29
7	34
8	36
9	45
10	46
11	50
12	61
13	85
14	89
15	91
16	104
17	112
18	117
19	118
20	119
21	129
22	130
23	137
24	138
25	143
26	147
27	148
28	158
29	178
30	179
31	181
32	185
33	200
34	202
35	206
36	214
37	220
38	233
39	238
40	239
41	244
42	248
43	249
44	258
45	262
46	275
47	299
48	304
49	314
50	333
51	338
52	340

n	a(n)
1	3
2	4
3	10
4	12
5	19
6	29
7	34
8	36
9	45
10	46
11	50
12	61
13	85
14	89
15	91
16	104
17	112
18	117
19	118
20	119
21	129
22	130
23	137
24	138
25	143
26	147
27	148
28	158
29	178
30	179
31	181
32	185
33	200
34	202
35	206
36	214
37	220
38	233
39	238
40	239
41	244
42	248
43	249
44	258
45	262
46	275
47	299
48	304
49	314
50	333
51	338
52	340

n	a(n)
1	3
2	4
3	10
4	12
5	19
6	29
7	34
8	36
9	45
10	46
11	50
12	61
13	85
14	89
15	91
16	104
17	112
18	117
19	118
20	119
21	129
22	130
23	137
24	138
25	143
26	147
27	148
28	158
29	178
30	179
31	181
32	185
33	200
34	202
35	206
36	214
37	220
38	233
39	238
40	239
41	244
42	248
43	249
44	258
45	262
46	275
47	299
48	304
49	314
50	333
51	338
52	340