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A098520 as a simple table

n a(n)
0 0
1 1
2 2
3 15
4 52
5 285
6 1206
7 6027
8 27560
9 134073
10 633130
11 3062279
12 14676828
13 71045845
14 343195230
15 1665555075
16 8084777040
17 39343835505
18 191627687250
19 934855945215
20 4565076327300
21 22318461756045
22 109211684822790
23 534907610833275
24 2621997452787192
25 12862364386480425
26 63140696801700986

[0,1,2,15,52,285,1206,6027,27560,134073,633130,
 3062279,14676828,71045845,343195230,1665555075,
 8084777040,39343835505,191627687250,934855945215,
 4565076327300,22318461756045,109211684822790,
 534907610833275,2621997452787192,
 12862364386480425,63140696801700986]

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Last modified May 13 02:41 EDT 2024. Contains 372497 sequences. (Running on oeis4.)