A001990 - OEIS

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A001990 as a simple table

n	a(n)
1	5
2	29
3	29
4	29
5	29
6	29
7	29
8	29
9	23669
10	23669
11	23669
12	23669
13	23669
14	23669
15	1508789
16	5025869
17	9636461
18	9636461
19	9636461
20	37989701
21	37989701
22	37989701
23	37989701
24	37989701
25	240511301
26	240511301

[5,29,29,29,29,29,29,29,23669,23669,23669,23669, 23669,23669,1508789,5025869,9636461,9636461, 9636461,37989701,37989701,37989701,37989701, 37989701,240511301,240511301]