A033679 - cp's OEIS frontend

A033679 a(1) = 2; a(n) is smallest number >= a(n-1) 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	53
8	69
9	81
10	139
11	143
12	223
13	233
14	261
15	261
16	399
17	553
18	609
19	659
20	673
21	1017
22	1187
23	1357
24	1571
25	1641
26	1839
27	2151
28	2191
29	2499
30	2511
31	2607
32	2667
33	2681
34	3081
35	3351
36	4291
37	4319
38	4353
39	4489
40	4733
41	4819
42	6003
43	6011
44	6631
45	6797
46	7113
47	7429
48	7547
49	7651

[2, 3, 3, 3, 3, 21, 53, 69, 81, 139, 143, 223, 233, 261, 261, 399, 553, 609, 659, 673, 1017, 1187, 1357, 1571, 1641, 1839, 2151, 2191, 2499, 2511, 2607, 2667, 2681, 3081, 3351, 4291, 4319, 4353, 4489, 4733, 4819, 6003, 6011, 6631, 6797, 7113, 7429, 7547, 7651]

cp's OEIS Frontend

A033679 a(1) = 2; a(n) is smallest number >= a(n-1) such that the juxtaposition a(1)a(2)...a(n) is a prime.

Table of values

List of values