A260892 - OEIS

A260892 as a simple table

n	a(n)
1	7
2	11
3	17
4	71
5	181
6	787
7	811
8	877
9	881
10	887
11	1117
12	1171
13	1181
14	1187
15	1777
16	1787
17	1811
18	1871
19	1877
20	7177
21	7187
22	7717
23	7817
24	7877
25	8111
26	8117
27	8171
28	8887
29	11117
30	11171
31	11177
32	11717
33	11777
34	11887
35	17117
36	17881
37	18181
38	18787
39	71171
40	71711
41	71777
42	71881
43	71887

[7,11,17,71,181,787,811,877,881,887,1117,1171, 1181,1187,1777,1787,1811,1871,1877,7177,7187,7717, 7817,7877,8111,8117,8171,8887,11117,11171,11177, 11717,11777,11887,17117,17881,18181,18787,71171, 71711,71777,71881,71887]