A321439 - cp's OEIS frontend

A321439 Numbers k such that if j is the sum of the first prime(k) primes then the sum of the first j primes is prime.

n	a(n)
1	8
2	21
3	27
4	37
5	59
6	65
7	66
8	82
9	86
10	99
11	105
12	111
13	126
14	143
15	147
16	155
17	156
18	165
19	177
20	181
21	187
22	194
23	195
24	200
25	230
26	231
27	242
28	262
29	284
30	374
31	430
32	449
33	460
34	477
35	502
36	512
37	539
38	540
39	541
40	622
41	634
42	657
43	707
44	731
45	735
46	739
47	745
48	766
49	767
50	781
51	784
52	785
53	791
54	801

[8, 21, 27, 37, 59, 65, 66, 82, 86, 99, 105, 111, 126, 143, 147, 155, 156, 165, 177, 181, 187, 194, 195, 200, 230, 231, 242, 262, 284, 374, 430, 449, 460, 477, 502, 512, 539, 540, 541, 622, 634, 657, 707, 731, 735, 739, 745, 766, 767, 781, 784, 785, 791, 801]

cp's OEIS Frontend

A321439 Numbers k such that if j is the sum of the first prime(k) primes then the sum of the first j primes is prime.

Table of values

List of values

n	a(n)
1	8
2	21
3	27
4	37
5	59
6	65
7	66
8	82
9	86
10	99
11	105
12	111
13	126
14	143
15	147
16	155
17	156
18	165
19	177
20	181
21	187
22	194
23	195
24	200
25	230
26	231
27	242
28	262
29	284
30	374
31	430
32	449
33	460
34	477
35	502
36	512
37	539
38	540
39	541
40	622
41	634
42	657
43	707
44	731
45	735
46	739
47	745
48	766
49	767
50	781
51	784
52	785
53	791
54	801

n	a(n)
1	8
2	21
3	27
4	37
5	59
6	65
7	66
8	82
9	86
10	99
11	105
12	111
13	126
14	143
15	147
16	155
17	156
18	165
19	177
20	181
21	187
22	194
23	195
24	200
25	230
26	231
27	242
28	262
29	284
30	374
31	430
32	449
33	460
34	477
35	502
36	512
37	539
38	540
39	541
40	622
41	634
42	657
43	707
44	731
45	735
46	739
47	745
48	766
49	767
50	781
51	784
52	785
53	791
54	801

n	a(n)
1	8
2	21
3	27
4	37
5	59
6	65
7	66
8	82
9	86
10	99
11	105
12	111
13	126
14	143
15	147
16	155
17	156
18	165
19	177
20	181
21	187
22	194
23	195
24	200
25	230
26	231
27	242
28	262
29	284
30	374
31	430
32	449
33	460
34	477
35	502
36	512
37	539
38	540
39	541
40	622
41	634
42	657
43	707
44	731
45	735
46	739
47	745
48	766
49	767
50	781
51	784
52	785
53	791
54	801