A165972 - cp's OEIS frontend

A165972 Nonprimes k such that the sum of the smallest and largest divisor of k is prime.

n	a(n)
1	1
2	4
3	6
4	10
5	12
6	16
7	18
8	22
9	28
10	30
11	36
12	40
13	42
14	46
15	52
16	58
17	60
18	66
19	70
20	72
21	78
22	82
23	88
24	96
25	100
26	102
27	106
28	108
29	112
30	126
31	130
32	136
33	138
34	148
35	150
36	156
37	162
38	166
39	172
40	178
41	180
42	190
43	192
44	196
45	198
46	210
47	222
48	226
49	228
50	232
51	238
52	240
53	250
54	256
55	262
56	268
57	270
58	276

[1, 4, 6, 10, 12, 16, 18, 22, 28, 30, 36, 40, 42, 46, 52, 58, 60, 66, 70, 72, 78, 82, 88, 96, 100, 102, 106, 108, 112, 126, 130, 136, 138, 148, 150, 156, 162, 166, 172, 178, 180, 190, 192, 196, 198, 210, 222, 226, 228, 232, 238, 240, 250, 256, 262, 268, 270, 276]

cp's OEIS Frontend

A165972 Nonprimes k such that the sum of the smallest and largest divisor of k is prime.

Table of values

List of values

n	a(n)
1	1
2	4
3	6
4	10
5	12
6	16
7	18
8	22
9	28
10	30
11	36
12	40
13	42
14	46
15	52
16	58
17	60
18	66
19	70
20	72
21	78
22	82
23	88
24	96
25	100
26	102
27	106
28	108
29	112
30	126
31	130
32	136
33	138
34	148
35	150
36	156
37	162
38	166
39	172
40	178
41	180
42	190
43	192
44	196
45	198
46	210
47	222
48	226
49	228
50	232
51	238
52	240
53	250
54	256
55	262
56	268
57	270
58	276

n	a(n)
1	1
2	4
3	6
4	10
5	12
6	16
7	18
8	22
9	28
10	30
11	36
12	40
13	42
14	46
15	52
16	58
17	60
18	66
19	70
20	72
21	78
22	82
23	88
24	96
25	100
26	102
27	106
28	108
29	112
30	126
31	130
32	136
33	138
34	148
35	150
36	156
37	162
38	166
39	172
40	178
41	180
42	190
43	192
44	196
45	198
46	210
47	222
48	226
49	228
50	232
51	238
52	240
53	250
54	256
55	262
56	268
57	270
58	276

n	a(n)
1	1
2	4
3	6
4	10
5	12
6	16
7	18
8	22
9	28
10	30
11	36
12	40
13	42
14	46
15	52
16	58
17	60
18	66
19	70
20	72
21	78
22	82
23	88
24	96
25	100
26	102
27	106
28	108
29	112
30	126
31	130
32	136
33	138
34	148
35	150
36	156
37	162
38	166
39	172
40	178
41	180
42	190
43	192
44	196
45	198
46	210
47	222
48	226
49	228
50	232
51	238
52	240
53	250
54	256
55	262
56	268
57	270
58	276