A069833 - cp's OEIS frontend

A069833 Prefixing, suffixing or inserting a 9 in the number anywhere gives a prime.

n	a(n)
1	7
2	19
3	37
4	41
5	91
6	199
7	209
8	239
9	311
10	539
11	587
12	661
13	749
14	923
15	931
16	941
17	967
18	1009
19	1079
20	1139
21	1997
22	2717
23	2959
24	3971
25	3979
26	4559
27	4993
28	4999
29	5393
30	5629
31	5651
32	6401
33	6739
34	6911
35	8213
36	8491
37	8939
38	9109
39	9397
40	9607
41	9679
42	9829
43	11089
44	11227
45	13943

[7, 19, 37, 41, 91, 199, 209, 239, 311, 539, 587, 661, 749, 923, 931, 941, 967, 1009, 1079, 1139, 1997, 2717, 2959, 3971, 3979, 4559, 4993, 4999, 5393, 5629, 5651, 6401, 6739, 6911, 8213, 8491, 8939, 9109, 9397, 9607, 9679, 9829, 11089, 11227, 13943]

cp's OEIS Frontend

A069833 Prefixing, suffixing or inserting a 9 in the number anywhere gives a prime.

Table of values

List of values