A090262 - cp's OEIS frontend

A090262 Numbers n such that the strings n1n and 1n1 are both prime.

n	a(n)
1	3
2	9
3	17
4	29
5	47
6	51
7	81
8	87
9	113
10	117
11	131
12	141
13	201
14	239
15	291
16	333
17	359
18	371
19	393
20	443
21	459
22	489
23	509
24	539
25	573
26	623
27	663
28	681
29	749
30	819
31	821
32	873
33	903
34	947
35	1071
36	1077
37	1161
38	1269
39	1533
40	1563
41	1589
42	1613
43	1637
44	1673
45	1767
46	1773
47	1821
48	1841
49	1883
50	1959
51	1977

[3, 9, 17, 29, 47, 51, 81, 87, 113, 117, 131, 141, 201, 239, 291, 333, 359, 371, 393, 443, 459, 489, 509, 539, 573, 623, 663, 681, 749, 819, 821, 873, 903, 947, 1071, 1077, 1161, 1269, 1533, 1563, 1589, 1613, 1637, 1673, 1767, 1773, 1821, 1841, 1883, 1959, 1977]

cp's OEIS Frontend

A090262 Numbers n such that the strings n1n and 1n1 are both prime.

Table of values

List of values