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A147257 as a simple table

n a(n)
1 1
2 1
3 1
4 1
5 1
6 5
7 17
8 39
9 137
10 661
11 3965
12 30475
13 261877
14 2593597
15 32463645
16 507974205
17 9631596681
18 224195557727
19 6341197277447
20 216685113312141
21 8987183183859385 

[1,1,1,1,1,5,17,39,137,661,3965,30475,261877,
 2593597,32463645,507974205,9631596681,
 224195557727,6341197277447,216685113312141,
 8987183183859385]

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Last modified April 25 11:39 EDT 2024. Contains 371969 sequences. (Running on oeis4.)