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A247768 as a simple table

n a(n)
0 1
1 1
2 3
3 36
4 177
5 1300
6 8866
7 54849
8 372943
9 2466986
10 16335736
11 108823634
12 719573862
13 4776148981
14 31691581679
15 210171600724
16 1394511598079
17 9249464911748
18 61356588838016
19 407022840274446
20 2699962045755658
21 17910503042677994
22 118809774179725990

[1,1,3,36,177,1300,8866,54849,372943,2466986,
 16335736,108823634,719573862,4776148981,
 31691581679,210171600724,1394511598079,
 9249464911748,61356588838016,407022840274446,
 2699962045755658,17910503042677994,
 118809774179725990]

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Last modified April 24 00:30 EDT 2024. Contains 371917 sequences. (Running on oeis4.)