A329121 - cp's OEIS frontend

A329121 Smallest k such that m//A002275(n)//m is prime, where // denotes concatenation, A002275(n) is the n-th repunit (R_n) and m = k+10^(A006519(n)-1).

n	a(n)
0	0
1	2
2	3
3	16
4	73
5	18
6	7
7	28
8	117
9	72
10	7
11	2
12	7
13	2
14	33
15	10
16	29
17	0
18	21
19	10
20	191
21	0
22	1133
23	30
24	79
25	20
26	81
27	58
28	19
29	2
30	57
31	116
32	77
33	108
34	79
35	48
36	97
37	40
38	1043
39	42
40	47
41	86
42	13
43	52
44	149
45	82
46	47
47	56
48	9
49	80
50	41
51	42
52	61
53	86
54	51
55	68
56	311
57	262
58	1001
59	222
60	7
61	496
62	1367
63	12

[0, 2, 3, 16, 73, 18, 7, 28, 117, 72, 7, 2, 7, 2, 33, 10, 29, 0, 21, 10, 191, 0, 1133, 30, 79, 20, 81, 58, 19, 2, 57, 116, 77, 108, 79, 48, 97, 40, 1043, 42, 47, 86, 13, 52, 149, 82, 47, 56, 9, 80, 41, 42, 61, 86, 51, 68, 311, 262, 1001, 222, 7, 496, 1367, 12]

cp's OEIS Frontend

A329121 Smallest k such that m//A002275(n)//m is prime, where // denotes concatenation, A002275(n) is the n-th repunit (R_n) and m = k+10^(A006519(n)-1).

Table of values

List of values