A213650 - cp's OEIS frontend

A213650 Numbers k such that the sum of the first k primes is semiprime.

n	a(n)
1	3
2	7
3	8
4	10
5	16
6	18
7	22
8	28
9	32
10	34
11	36
12	38
13	44
14	46
15	48
16	54
17	55
18	58
19	59
20	65
21	66
22	72
23	75
24	82
25	92
26	93
27	94
28	104
29	106
30	110
31	118
32	120
33	133
34	136
35	137
36	138
37	140
38	141
39	142
40	144
41	148
42	150
43	154
44	156
45	164
46	168
47	170
48	174
49	190
50	194
51	202
52	210
53	212
54	218
55	224
56	226
57	232
58	234

[3, 7, 8, 10, 16, 18, 22, 28, 32, 34, 36, 38, 44, 46, 48, 54, 55, 58, 59, 65, 66, 72, 75, 82, 92, 93, 94, 104, 106, 110, 118, 120, 133, 136, 137, 138, 140, 141, 142, 144, 148, 150, 154, 156, 164, 168, 170, 174, 190, 194, 202, 210, 212, 218, 224, 226, 232, 234]

cp's OEIS Frontend

A213650 Numbers k such that the sum of the first k primes is semiprime.

Table of values

List of values

n	a(n)
1	3
2	7
3	8
4	10
5	16
6	18
7	22
8	28
9	32
10	34
11	36
12	38
13	44
14	46
15	48
16	54
17	55
18	58
19	59
20	65
21	66
22	72
23	75
24	82
25	92
26	93
27	94
28	104
29	106
30	110
31	118
32	120
33	133
34	136
35	137
36	138
37	140
38	141
39	142
40	144
41	148
42	150
43	154
44	156
45	164
46	168
47	170
48	174
49	190
50	194
51	202
52	210
53	212
54	218
55	224
56	226
57	232
58	234

n	a(n)
1	3
2	7
3	8
4	10
5	16
6	18
7	22
8	28
9	32
10	34
11	36
12	38
13	44
14	46
15	48
16	54
17	55
18	58
19	59
20	65
21	66
22	72
23	75
24	82
25	92
26	93
27	94
28	104
29	106
30	110
31	118
32	120
33	133
34	136
35	137
36	138
37	140
38	141
39	142
40	144
41	148
42	150
43	154
44	156
45	164
46	168
47	170
48	174
49	190
50	194
51	202
52	210
53	212
54	218
55	224
56	226
57	232
58	234

n	a(n)
1	3
2	7
3	8
4	10
5	16
6	18
7	22
8	28
9	32
10	34
11	36
12	38
13	44
14	46
15	48
16	54
17	55
18	58
19	59
20	65
21	66
22	72
23	75
24	82
25	92
26	93
27	94
28	104
29	106
30	110
31	118
32	120
33	133
34	136
35	137
36	138
37	140
38	141
39	142
40	144
41	148
42	150
43	154
44	156
45	164
46	168
47	170
48	174
49	190
50	194
51	202
52	210
53	212
54	218
55	224
56	226
57	232
58	234