A217788 - cp's OEIS frontend

A217788 Least integer s > p_n such that sum_{k=1}^n p_k*s^(n-k) (the number [p_1,...,p_n] in base s) is prime, where p_k denotes the k-th prime.

n	a(n)
1	3
2	4
3	8
4	9
5	16
6	15
7	72
8	37
9	30
10	54
11	54
12	54
13	80
14	91
15	78
16	204
17	182
18	110
19	286
20	183
21	158
22	231
23	228
24	105
25	252
26	189
27	198
28	119
29	178
30	252
31	280
32	152
33	164
34	423
35	170
36	185
37	190
38	249
39	1006
40	249
41	678
42	200
43	254
44	480
45	216
46	234
47	322
48	601
49	264
50	301
51	260
52	269
53	244
54	308
55	280
56	364
57	612
58	635
59	310
60	420

[3, 4, 8, 9, 16, 15, 72, 37, 30, 54, 54, 54, 80, 91, 78, 204, 182, 110, 286, 183, 158, 231, 228, 105, 252, 189, 198, 119, 178, 252, 280, 152, 164, 423, 170, 185, 190, 249, 1006, 249, 678, 200, 254, 480, 216, 234, 322, 601, 264, 301, 260, 269, 244, 308, 280, 364, 612, 635, 310, 420]

cp's OEIS Frontend

A217788 Least integer s > p_n such that sum_{k=1}^n p_k*s^(n-k) (the number [p_1,...,p_n] in base s) is prime, where p_k denotes the k-th prime.

Table of values

List of values