A109608 - cp's OEIS frontend

A109608 Numbers n such that the number of digits required to write the prime factors of n equals the number of digits of n.

n	a(n)
1	2
2	3
3	5
4	7
5	10
6	11
7	13
8	14
9	15
10	17
11	19
12	21
13	23
14	25
15	29
16	31
17	35
18	37
19	41
20	43
21	47
22	49
23	53
24	59
25	61
26	67
27	71
28	73
29	79
30	83
31	89
32	97
33	101
34	103
35	105
36	106
37	107
38	109
39	111
40	113
41	115
42	118
43	119
44	122
45	123
46	125
47	127
48	129
49	131
50	133
51	134
52	137
53	139
54	141
55	142
56	145
57	146
58	147
59	149
60	151
61	155

[2, 3, 5, 7, 10, 11, 13, 14, 15, 17, 19, 21, 23, 25, 29, 31, 35, 37, 41, 43, 47, 49, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101, 103, 105, 106, 107, 109, 111, 113, 115, 118, 119, 122, 123, 125, 127, 129, 131, 133, 134, 137, 139, 141, 142, 145, 146, 147, 149, 151, 155]

cp's OEIS Frontend

A109608 Numbers n such that the number of digits required to write the prime factors of n equals the number of digits of n.

Table of values

List of values

n	a(n)
1	2
2	3
3	5
4	7
5	10
6	11
7	13
8	14
9	15
10	17
11	19
12	21
13	23
14	25
15	29
16	31
17	35
18	37
19	41
20	43
21	47
22	49
23	53
24	59
25	61
26	67
27	71
28	73
29	79
30	83
31	89
32	97
33	101
34	103
35	105
36	106
37	107
38	109
39	111
40	113
41	115
42	118
43	119
44	122
45	123
46	125
47	127
48	129
49	131
50	133
51	134
52	137
53	139
54	141
55	142
56	145
57	146
58	147
59	149
60	151
61	155

n	a(n)
1	2
2	3
3	5
4	7
5	10
6	11
7	13
8	14
9	15
10	17
11	19
12	21
13	23
14	25
15	29
16	31
17	35
18	37
19	41
20	43
21	47
22	49
23	53
24	59
25	61
26	67
27	71
28	73
29	79
30	83
31	89
32	97
33	101
34	103
35	105
36	106
37	107
38	109
39	111
40	113
41	115
42	118
43	119
44	122
45	123
46	125
47	127
48	129
49	131
50	133
51	134
52	137
53	139
54	141
55	142
56	145
57	146
58	147
59	149
60	151
61	155

n	a(n)
1	2
2	3
3	5
4	7
5	10
6	11
7	13
8	14
9	15
10	17
11	19
12	21
13	23
14	25
15	29
16	31
17	35
18	37
19	41
20	43
21	47
22	49
23	53
24	59
25	61
26	67
27	71
28	73
29	79
30	83
31	89
32	97
33	101
34	103
35	105
36	106
37	107
38	109
39	111
40	113
41	115
42	118
43	119
44	122
45	123
46	125
47	127
48	129
49	131
50	133
51	134
52	137
53	139
54	141
55	142
56	145
57	146
58	147
59	149
60	151
61	155