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A248871 as a simple table

n a(n)
0 1
1 1
2 3
3 12
4 66
5 450
6 3679
7 35260
8 388511
9 4844584
10 67502450
11 1039929756
12 17556193609
13 322321551868
14 6393505020803
15 136245752898586
16 3103879644045050
17 75268872986970840
18 1935571325829192247
19 52605265683008056660
20 1506530437404419817467

[1,1,3,12,66,450,3679,35260,388511,4844584,
 67502450,1039929756,17556193609,322321551868,
 6393505020803,136245752898586,3103879644045050,
 75268872986970840,1935571325829192247,
 52605265683008056660,1506530437404419817467]

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Last modified March 28 14:02 EDT 2024. Contains 371254 sequences. (Running on oeis4.)