A033681 - cp's OEIS frontend

A033681 a(1) = 3; 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	3
2	7
3	9
4	51
5	51
6	51
7	97
8	131
9	157
10	159
11	243
12	309
13	327
14	363
15	383
16	411
17	487
18	639
19	873
20	983
21	1231
22	1257
23	1337
24	1549
25	1589
26	2101
27	2159
28	2317
29	2871
30	2907
31	4053
32	4097
33	4597
34	4703
35	5559
36	5799
37	6337
38	6527
39	6561
40	6939
41	7147
42	7167
43	7839
44	8403
45	8873
46	9237
47	9541
48	9771

[3, 7, 9, 51, 51, 51, 97, 131, 157, 159, 243, 309, 327, 363, 383, 411, 487, 639, 873, 983, 1231, 1257, 1337, 1549, 1589, 2101, 2159, 2317, 2871, 2907, 4053, 4097, 4597, 4703, 5559, 5799, 6337, 6527, 6561, 6939, 7147, 7167, 7839, 8403, 8873, 9237, 9541, 9771]

cp's OEIS Frontend

A033681 a(1) = 3; 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