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A081018 as a simple table

n a(n)
0 0
1 2
2 15
3 104
4 714
5 4895
6 33552
7 229970
8 1576239
9 10803704
10 74049690
11 507544127
12 3478759200
13 23843770274
14 163427632719
15 1120149658760
16 7677619978602
17 52623190191455
18 360684711361584
19 2472169789339634
20 16944503814015855
21 116139356908771352
22 796030994547383610

[0,2,15,104,714,4895,33552,229970,1576239,
 10803704,74049690,507544127,3478759200,
 23843770274,163427632719,1120149658760,
 7677619978602,52623190191455,360684711361584,
 2472169789339634,16944503814015855,
 116139356908771352,796030994547383610]

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Last modified September 22 17:33 EDT 2019. Contains 327311 sequences. (Running on oeis4.)