A216167 - cp's OEIS frontend

A216167 Composite numbers which yield a prime whenever a 5 is inserted anywhere in them, excluding at the end.

n	a(n)
1	9
2	21
3	57
4	63
5	69
6	77
7	87
8	93
9	153
10	231
11	381
12	407
13	413
14	417
15	501
16	531
17	581
18	651
19	669
20	741
21	749
22	783
23	791
24	987
25	1241
26	1551
27	1797
28	1971
29	2189
30	2981
31	3381
32	3419
33	3591
34	3951
35	4083
36	4503
37	4833
38	4949
39	4959
40	5049
41	5117
42	5201
43	5229
44	5243
45	5529
46	5547
47	5603
48	5691
49	5697

[9, 21, 57, 63, 69, 77, 87, 93, 153, 231, 381, 407, 413, 417, 501, 531, 581, 651, 669, 741, 749, 783, 791, 987, 1241, 1551, 1797, 1971, 2189, 2981, 3381, 3419, 3591, 3951, 4083, 4503, 4833, 4949, 4959, 5049, 5117, 5201, 5229, 5243, 5529, 5547, 5603, 5691, 5697]

cp's OEIS Frontend

A216167 Composite numbers which yield a prime whenever a 5 is inserted anywhere in them, excluding at the end.

Table of values

List of values