A069604 - cp's OEIS frontend

A069604 a(1) = 1; for n>1, a(n) = smallest number with all odd digits giving a prime in concatenation with the previous terms.

n	a(n)
1	1
2	1
3	3
4	11
5	1
6	3
7	3
8	53
9	13
10	39
11	9
12	3
13	399
14	11
15	9
16	133
17	3
18	11
19	51
20	111
21	13
22	53
23	31
24	3
25	173
26	1
27	317
28	519
29	579
30	1
31	573
32	357
33	5111
34	39
35	51
36	73
37	3317
38	1977
39	5173
40	579
41	357
42	359
43	9
44	57
45	3991
46	959
47	951
48	7
49	111
50	1959
51	39
52	191
53	3357
54	3151
55	3137
56	577
57	117
58	1353
59	951
60	153
61	99

[1, 1, 3, 11, 1, 3, 3, 53, 13, 39, 9, 3, 399, 11, 9, 133, 3, 11, 51, 111, 13, 53, 31, 3, 173, 1, 317, 519, 579, 1, 573, 357, 5111, 39, 51, 73, 3317, 1977, 5173, 579, 357, 359, 9, 57, 3991, 959, 951, 7, 111, 1959, 39, 191, 3357, 3151, 3137, 577, 117, 1353, 951, 153, 99]

cp's OEIS Frontend

A069604 a(1) = 1; for n>1, a(n) = smallest number with all odd digits giving a prime in concatenation with the previous terms.

Table of values

List of values