A040981 - OEIS

A040981 as a simple table

n	a(n)
1	11
2	31
3	41
4	61
5	71
6	101
7	151
8	181
9	191
10	211
11	241
12	251
13	271
14	281
15	331
16	401
17	421
18	461
19	491
20	541
21	571
22	641
23	661
24	691
25	701
26	751
27	761
28	811
29	821
30	881
31	911
32	941
33	971
34	1021
35	1031
36	1051
37	1091
38	1151
39	1171
40	1181
41	1201
42	1231
43	1301
44	1361
45	1471

[11,31,41,61,71,101,151,181,191,211,241,251,271, 281,331,401,421,461,491,541,571,641,661,691,701, 751,761,811,821,881,911,941,971,1021,1031,1051, 1091,1151,1171,1181,1201,1231,1301,1361,1471]