A105428 - OEIS

A105428 as a simple table

n	a(n)
1	7
2	31
3	67
4	151
5	23
6	13
7	7
8	157
9	163
10	107
11	17
12	13
13	7
14	89
15	170809
16	31
17	13
18	7
19	4363363
20	251
21	42169
22	43
23	13
24	7
25	641
26	17
27	6791
28	109
29	13
30	7
31	31
32	29
33	373
34	261382937
35	13
36	7
37	101921
38	82647847
39	443
40	13
41	7
42	43
43	1042402171
44	71
45	31
46	13
47	7
48	1601
49	425519761

[7,31,67,151,23,13,7,157,163,107,17,13,7,89, 170809,31,13,7,4363363,251,42169,43,13,7,641,17, 6791,109,13,7,31,29,373,261382937,13,7,101921, 82647847,443,13,7,43,1042402171,71,31,13,7,1601, 425519761]