A046254 - cp's OEIS frontend

A046254 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	9
5	39
6	47
7	57
8	81
9	111
10	123
11	243
12	283
13	287
14	313
15	407
16	507
17	807
18	1057
19	1209
20	1211
21	1443
22	1447
23	1619
24	2019
25	2269
26	2429
27	2637
28	2679
29	2751
30	3007
31	3287
32	3789
33	3829
34	3833
35	3949
36	4151
37	4533
38	4821
39	5097
40	5331
41	5457
42	5529
43	5691
44	6021
45	6153
46	6393
47	6409

[4, 7, 9, 9, 39, 47, 57, 81, 111, 123, 243, 283, 287, 313, 407, 507, 807, 1057, 1209, 1211, 1443, 1447, 1619, 2019, 2269, 2429, 2637, 2679, 2751, 3007, 3287, 3789, 3829, 3833, 3949, 4151, 4533, 4821, 5097, 5331, 5457, 5529, 5691, 6021, 6153, 6393, 6409]

cp's OEIS Frontend

A046254 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