A103891 - OEIS

A103891 as a simple table

n	a(n)
1	2
2	2
3	5
4	5
5	11
6	7
7	19
8	31
9	27893
10	223
11	554797
12	10333
13	29
14	61
15	28652131
16	293049347
17	7731517
18	1483
19	73
20	337809273983
21	67
22	440939
23	1321
24	94099
25	89
26	107
27	281
28	1908113757161297657
29	479
30	61
31	167
32	3121
33	177907
34	5039
35	11519
36	281
37	612153149
38	587
39	2753
40	21491
41	2897
42	97
43	307

[2,2,5,5,11,7,19,31,27893,223,554797,10333,29,61, 28652131,293049347,7731517,1483,73,337809273983, 67,440939,1321,94099,89,107,281, 1908113757161297657,479,61,167,3121,177907,5039, 11519,281,612153149,587,2753,21491,2897,97,307]