A000945 - OEIS

A000945 as a simple table

n	a(n)
1	2
2	3
3	7
4	43
5	13
6	53
7	5
8	6221671
9	38709183810571
10	139
11	2801
12	11
13	17
14	5471
15	52662739
16	23003
17	30693651606209
18	37
19	1741
20	1313797957
21	887
22	71
23	7127
24	109
25	23
26	97
27	159227
28	643679794963466223081509857
29	103
30	1079990819
31	9539
32	3143065813
33	29
34	3847
35	89
36	19
37	577
38	223
39	139703
40	457
41	9649
42	61
43	4357

[2,3,7,43,13,53,5,6221671,38709183810571,139,2801, 11,17,5471,52662739,23003,30693651606209,37,1741, 1313797957,887,71,7127,109,23,97,159227, 643679794963466223081509857,103,1079990819,9539, 3143065813,29,3847,89,19,577,223,139703,457,9649, 61,4357]