A096097 - cp's OEIS frontend

A096097 a(1) = 2, a(2) = 1; for n >= 3, a(n) = least prime not included earlier that divides the concatenation of all previous terms.

n	a(n)
1	2
2	1
3	3
4	71
5	7
6	10177
7	2100001
8	101770000001
9	4603
10	13
11	107
12	4013
13	23
14	3097349301044927552199565217412468305904367
15	1847
16	37
17	367767021959
18	54371
19	3229
20	17
21	520063
22	29
23	389
24	8059
25	732713
26	11
27	7123120001
28	137
29	294563
30	1656881076199062425029
31	313583
32	4817
33	277

[2, 1, 3, 71, 7, 10177, 2100001, 101770000001, 4603, 13, 107, 4013, 23, 3097349301044927552199565217412468305904367, 1847, 37, 367767021959, 54371, 3229, 17, 520063, 29, 389, 8059, 732713, 11, 7123120001, 137, 294563, 1656881076199062425029, 313583, 4817, 277]

cp's OEIS Frontend

A096097 a(1) = 2, a(2) = 1; for n >= 3, a(n) = least prime not included earlier that divides the concatenation of all previous terms.

Table of values

List of values