A371656 - cp's OEIS frontend

A371656 Numbers k such that k - 2 and k + 2 have the same number of prime factors, counted with multiplicity.

n	a(n)
1	5
2	8
3	9
4	10
5	12
6	15
7	21
8	23
9	24
10	36
11	37
12	38
13	39
14	45
15	53
16	58
17	60
18	67
19	68
20	69
21	81
22	84
23	86
24	89
25	93
26	99
27	100
28	102
29	105
30	110
31	111
32	112
33	113
34	117
35	120
36	121
37	129
38	131
39	134
40	138
41	143
42	144
43	154
44	157
45	165
46	172
47	173
48	178
49	184
50	185
51	188
52	195
53	203
54	204
55	207
56	211
57	215
58	216
59	217
60	219
61	225
62	230
63	231
64	240
65	244

[5, 8, 9, 10, 12, 15, 21, 23, 24, 36, 37, 38, 39, 45, 53, 58, 60, 67, 68, 69, 81, 84, 86, 89, 93, 99, 100, 102, 105, 110, 111, 112, 113, 117, 120, 121, 129, 131, 134, 138, 143, 144, 154, 157, 165, 172, 173, 178, 184, 185, 188, 195, 203, 204, 207, 211, 215, 216, 217, 219, 225, 230, 231, 240, 244]

cp's OEIS Frontend

A371656 Numbers k such that k - 2 and k + 2 have the same number of prime factors, counted with multiplicity.

Table of values

List of values

n	a(n)
1	5
2	8
3	9
4	10
5	12
6	15
7	21
8	23
9	24
10	36
11	37
12	38
13	39
14	45
15	53
16	58
17	60
18	67
19	68
20	69
21	81
22	84
23	86
24	89
25	93
26	99
27	100
28	102
29	105
30	110
31	111
32	112
33	113
34	117
35	120
36	121
37	129
38	131
39	134
40	138
41	143
42	144
43	154
44	157
45	165
46	172
47	173
48	178
49	184
50	185
51	188
52	195
53	203
54	204
55	207
56	211
57	215
58	216
59	217
60	219
61	225
62	230
63	231
64	240
65	244

n	a(n)
1	5
2	8
3	9
4	10
5	12
6	15
7	21
8	23
9	24
10	36
11	37
12	38
13	39
14	45
15	53
16	58
17	60
18	67
19	68
20	69
21	81
22	84
23	86
24	89
25	93
26	99
27	100
28	102
29	105
30	110
31	111
32	112
33	113
34	117
35	120
36	121
37	129
38	131
39	134
40	138
41	143
42	144
43	154
44	157
45	165
46	172
47	173
48	178
49	184
50	185
51	188
52	195
53	203
54	204
55	207
56	211
57	215
58	216
59	217
60	219
61	225
62	230
63	231
64	240
65	244

n	a(n)
1	5
2	8
3	9
4	10
5	12
6	15
7	21
8	23
9	24
10	36
11	37
12	38
13	39
14	45
15	53
16	58
17	60
18	67
19	68
20	69
21	81
22	84
23	86
24	89
25	93
26	99
27	100
28	102
29	105
30	110
31	111
32	112
33	113
34	117
35	120
36	121
37	129
38	131
39	134
40	138
41	143
42	144
43	154
44	157
45	165
46	172
47	173
48	178
49	184
50	185
51	188
52	195
53	203
54	204
55	207
56	211
57	215
58	216
59	217
60	219
61	225
62	230
63	231
64	240
65	244