A200677 - cp's OEIS frontend

A200677 Smallest semiprime such that the sum of the two prime factors equals n, or zero if impossible.

n	a(n)
1	0
2	0
3	0
4	4
5	6
6	9
7	10
8	15
9	14
10	21
11	0
12	35
13	22
14	33
15	26
16	39
17	0
18	65
19	34
20	51
21	38
22	57
23	0
24	95
25	46
26	69
27	0
28	115
29	0
30	161
31	58
32	87
33	62
34	93
35	0
36	155
37	0
38	217
39	74
40	111
41	0
42	185
43	82
44	123
45	86
46	129
47	0
48	215
49	94
50	141
51	0
52	235
53	0
54	329
55	106
56	159
57	0
58	265
59	0
60	371
61	118
62	177
63	122
64	183
65	0

[0, 0, 0, 4, 6, 9, 10, 15, 14, 21, 0, 35, 22, 33, 26, 39, 0, 65, 34, 51, 38, 57, 0, 95, 46, 69, 0, 115, 0, 161, 58, 87, 62, 93, 0, 155, 0, 217, 74, 111, 0, 185, 82, 123, 86, 129, 0, 215, 94, 141, 0, 235, 0, 329, 106, 159, 0, 265, 0, 371, 118, 177, 122, 183, 0]

cp's OEIS Frontend

A200677 Smallest semiprime such that the sum of the two prime factors equals n, or zero if impossible.

Table of values

List of values

n	a(n)
1	0
2	0
3	0
4	4
5	6
6	9
7	10
8	15
9	14
10	21
11	0
12	35
13	22
14	33
15	26
16	39
17	0
18	65
19	34
20	51
21	38
22	57
23	0
24	95
25	46
26	69
27	0
28	115
29	0
30	161
31	58
32	87
33	62
34	93
35	0
36	155
37	0
38	217
39	74
40	111
41	0
42	185
43	82
44	123
45	86
46	129
47	0
48	215
49	94
50	141
51	0
52	235
53	0
54	329
55	106
56	159
57	0
58	265
59	0
60	371
61	118
62	177
63	122
64	183
65	0

n	a(n)
1	0
2	0
3	0
4	4
5	6
6	9
7	10
8	15
9	14
10	21
11	0
12	35
13	22
14	33
15	26
16	39
17	0
18	65
19	34
20	51
21	38
22	57
23	0
24	95
25	46
26	69
27	0
28	115
29	0
30	161
31	58
32	87
33	62
34	93
35	0
36	155
37	0
38	217
39	74
40	111
41	0
42	185
43	82
44	123
45	86
46	129
47	0
48	215
49	94
50	141
51	0
52	235
53	0
54	329
55	106
56	159
57	0
58	265
59	0
60	371
61	118
62	177
63	122
64	183
65	0

n	a(n)
1	0
2	0
3	0
4	4
5	6
6	9
7	10
8	15
9	14
10	21
11	0
12	35
13	22
14	33
15	26
16	39
17	0
18	65
19	34
20	51
21	38
22	57
23	0
24	95
25	46
26	69
27	0
28	115
29	0
30	161
31	58
32	87
33	62
34	93
35	0
36	155
37	0
38	217
39	74
40	111
41	0
42	185
43	82
44	123
45	86
46	129
47	0
48	215
49	94
50	141
51	0
52	235
53	0
54	329
55	106
56	159
57	0
58	265
59	0
60	371
61	118
62	177
63	122
64	183
65	0