A069603 - cp's OEIS frontend

A069603 a(1) = 2; a(n) = smallest number such that the juxtaposition a(1)a(2)...a(n) is a prime.

n	a(n)
1	2
2	3
3	3
4	3
5	3
6	21
7	17
8	3
9	13
10	99
11	17
12	3
13	7
14	77
15	19
16	119
17	7
18	33
19	29
20	49
21	149
22	43
23	23
24	99
25	9
26	31
27	57
28	93
29	29
30	21
31	91
32	59
33	31
34	39
35	87
36	11
37	121
38	231
39	279
40	269
41	51
42	21
43	313
44	297
45	527
46	309
47	27
48	21
49	67
50	63
51	431
52	231
53	13
54	99
55	407
56	453
57	69
58	409
59	189
60	11
61	31
62	21
63	23
64	19
65	93
66	1143

[2, 3, 3, 3, 3, 21, 17, 3, 13, 99, 17, 3, 7, 77, 19, 119, 7, 33, 29, 49, 149, 43, 23, 99, 9, 31, 57, 93, 29, 21, 91, 59, 31, 39, 87, 11, 121, 231, 279, 269, 51, 21, 313, 297, 527, 309, 27, 21, 67, 63, 431, 231, 13, 99, 407, 453, 69, 409, 189, 11, 31, 21, 23, 19, 93, 1143]

cp's OEIS Frontend

A069603 a(1) = 2; a(n) = smallest number such that the juxtaposition a(1)a(2)...a(n) is a prime.

Table of values

List of values