A118568 - OEIS

A118568 as a simple table

n	a(n)
1	21
2	25
3	43
4	49
5	63
6	67
7	69
8	87
9	201
10	205
11	223
12	241
13	261
14	267
15	283
16	285
17	289
18	409
19	421
20	427
21	429
22	463
23	483
24	487
25	489
26	601
27	621
28	643
29	645
30	685
31	801
32	805
33	823
34	841
35	867
36	883
37	885
38	2001
39	2023
40	2065
41	2067
42	2083
43	2085
44	2209
45	2221
46	2281
47	2283
48	2403
49	2407
50	2409
51	2427
52	2445
53	2461
54	2467

[21,25,43,49,63,67,69,87,201,205,223,241,261,267, 283,285,289,409,421,427,429,463,483,487,489,601, 621,643,645,685,801,805,823,841,867,883,885,2001, 2023,2065,2067,2083,2085,2209,2221,2281,2283,2403, 2407,2409,2427,2445,2461,2467]