A074341 - cp's OEIS frontend

A074341 a(1) = 4; 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	4
2	7
3	9
4	11
5	81
6	87
7	109
8	117
9	123
10	129
11	201
12	389
13	429
14	441
15	771
16	811
17	831
18	1037
19	1143
20	1299
21	1569
22	1581
23	1803
24	1837
25	1943
26	2053
27	2171
28	2379
29	2431
30	3201
31	3437
32	3489
33	3723
34	3841
35	4289
36	4801
37	5523
38	6249
39	7083
40	7467
41	7749
42	8171
43	9073
44	9333
45	9683
46	9781
47	10833

[4, 7, 9, 11, 81, 87, 109, 117, 123, 129, 201, 389, 429, 441, 771, 811, 831, 1037, 1143, 1299, 1569, 1581, 1803, 1837, 1943, 2053, 2171, 2379, 2431, 3201, 3437, 3489, 3723, 3841, 4289, 4801, 5523, 6249, 7083, 7467, 7749, 8171, 9073, 9333, 9683, 9781, 10833]

cp's OEIS Frontend

A074341 a(1) = 4; 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