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A193465 as a simple table

n a(n)
0 0
1 2
2 9
3 52
4 335
5 2466
6 20447
7 189064
8 1930959
9 21603430
10 262869959
11 3457226268
12 48880169351
13 739429561066
14 11918051268255
15 203914545928336
16 3691384616598047
17 70491995143458894
18 1416242276574905879
19 29862732908481855460
20 659413025994777460119

[0,2,9,52,335,2466,20447,189064,1930959,21603430,
 262869959,3457226268,48880169351,739429561066,
 11918051268255,203914545928336,3691384616598047,
 70491995143458894,1416242276574905879,
 29862732908481855460,659413025994777460119]

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Last modified May 11 12:39 EDT 2021. Contains 343791 sequences. (Running on oeis4.)