A176504 - cp's OEIS frontend

A176504 a(n) = m + k where prime(m)*prime(k) = semiprime(n).

n	a(n)
1	2
2	3
3	4
4	4
5	5
6	5
7	6
8	6
9	6
10	7
11	7
12	8
13	7
14	9
15	8
16	10
17	8
18	9
19	8
20	10
21	11
22	12
23	9
24	11
25	13
26	9
27	14
28	10
29	15
30	12
31	10
32	13
33	16
34	11
35	17
36	14
37	12
38	18
39	11
40	10
41	19
42	15
43	16
44	12
45	20
46	17
47	21
48	11
49	13
50	22
51	14
52	23
53	18
54	13
55	24
56	12
57	19
58	25
59	20
60	15
61	12
62	26
63	21
64	27
65	14
66	16
67	28
68	13
69	22
70	29
71	17
72	15
73	30
74	23
75	13
76	31

[2, 3, 4, 4, 5, 5, 6, 6, 6, 7, 7, 8, 7, 9, 8, 10, 8, 9, 8, 10, 11, 12, 9, 11, 13, 9, 14, 10, 15, 12, 10, 13, 16, 11, 17, 14, 12, 18, 11, 10, 19, 15, 16, 12, 20, 17, 21, 11, 13, 22, 14, 23, 18, 13, 24, 12, 19, 25, 20, 15, 12, 26, 21, 27, 14, 16, 28, 13, 22, 29, 17, 15, 30, 23, 13, 31]

cp's OEIS Frontend

A176504 a(n) = m + k where prime(m)*prime(k) = semiprime(n).

Table of values

List of values

n	a(n)
1	2
2	3
3	4
4	4
5	5
6	5
7	6
8	6
9	6
10	7
11	7
12	8
13	7
14	9
15	8
16	10
17	8
18	9
19	8
20	10
21	11
22	12
23	9
24	11
25	13
26	9
27	14
28	10
29	15
30	12
31	10
32	13
33	16
34	11
35	17
36	14
37	12
38	18
39	11
40	10
41	19
42	15
43	16
44	12
45	20
46	17
47	21
48	11
49	13
50	22
51	14
52	23
53	18
54	13
55	24
56	12
57	19
58	25
59	20
60	15
61	12
62	26
63	21
64	27
65	14
66	16
67	28
68	13
69	22
70	29
71	17
72	15
73	30
74	23
75	13
76	31

n	a(n)
1	2
2	3
3	4
4	4
5	5
6	5
7	6
8	6
9	6
10	7
11	7
12	8
13	7
14	9
15	8
16	10
17	8
18	9
19	8
20	10
21	11
22	12
23	9
24	11
25	13
26	9
27	14
28	10
29	15
30	12
31	10
32	13
33	16
34	11
35	17
36	14
37	12
38	18
39	11
40	10
41	19
42	15
43	16
44	12
45	20
46	17
47	21
48	11
49	13
50	22
51	14
52	23
53	18
54	13
55	24
56	12
57	19
58	25
59	20
60	15
61	12
62	26
63	21
64	27
65	14
66	16
67	28
68	13
69	22
70	29
71	17
72	15
73	30
74	23
75	13
76	31

n	a(n)
1	2
2	3
3	4
4	4
5	5
6	5
7	6
8	6
9	6
10	7
11	7
12	8
13	7
14	9
15	8
16	10
17	8
18	9
19	8
20	10
21	11
22	12
23	9
24	11
25	13
26	9
27	14
28	10
29	15
30	12
31	10
32	13
33	16
34	11
35	17
36	14
37	12
38	18
39	11
40	10
41	19
42	15
43	16
44	12
45	20
46	17
47	21
48	11
49	13
50	22
51	14
52	23
53	18
54	13
55	24
56	12
57	19
58	25
59	20
60	15
61	12
62	26
63	21
64	27
65	14
66	16
67	28
68	13
69	22
70	29
71	17
72	15
73	30
74	23
75	13
76	31