A216165 - cp's OEIS frontend

A216165 Composite numbers and 1 which yield a prime whenever a 1 is inserted anywhere in them, including at the beginning or end.

n	a(n)
1	1
2	49
3	63
4	81
5	91
6	99
7	117
8	123
9	213
10	231
11	279
12	319
13	427
14	459
15	621
16	697
17	721
18	801
19	951
20	987
21	1113
22	1131
23	1261
24	1821
25	1939
26	2101
27	2149
28	2211
29	2517
30	2611
31	3151
32	3219
33	4011
34	4411
35	4887
36	5031
37	5361
38	6231
39	6487
40	7011
41	7209
42	8671
43	9141
44	9801
45	10051
46	10161
47	10281

[1, 49, 63, 81, 91, 99, 117, 123, 213, 231, 279, 319, 427, 459, 621, 697, 721, 801, 951, 987, 1113, 1131, 1261, 1821, 1939, 2101, 2149, 2211, 2517, 2611, 3151, 3219, 4011, 4411, 4887, 5031, 5361, 6231, 6487, 7011, 7209, 8671, 9141, 9801, 10051, 10161, 10281]

cp's OEIS Frontend

A216165 Composite numbers and 1 which yield a prime whenever a 1 is inserted anywhere in them, including at the beginning or end.

Table of values

List of values