A321342 - cp's OEIS frontend

A321342 Numbers k such that if j is the sum of the first k primes, then the sum of the first j primes is prime.

n	a(n)
1	1
2	9
3	15
4	19
5	73
6	85
7	87
8	103
9	121
10	157
11	175
12	277
13	313
14	317
15	341
16	357
17	375
18	385
19	391
20	421
21	443
22	447
23	523
24	525
25	539
26	571
27	607
28	611
29	645
30	701
31	779
32	783
33	791
34	799
35	823
36	831
37	835
38	853
39	889
40	907
41	911
42	925
43	977
44	1051
45	1075
46	1081
47	1087
48	1095
49	1117
50	1125
51	1135
52	1157
53	1181
54	1187
55	1223
56	1257
57	1305
58	1325

[1, 9, 15, 19, 73, 85, 87, 103, 121, 157, 175, 277, 313, 317, 341, 357, 375, 385, 391, 421, 443, 447, 523, 525, 539, 571, 607, 611, 645, 701, 779, 783, 791, 799, 823, 831, 835, 853, 889, 907, 911, 925, 977, 1051, 1075, 1081, 1087, 1095, 1117, 1125, 1135, 1157, 1181, 1187, 1223, 1257, 1305, 1325]

cp's OEIS Frontend

A321342 Numbers k such that if j is the sum of the first k primes, then the sum of the first j primes is prime.

Table of values

List of values