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A009268 as a simple table

n a(n)
0 1
1 1
2 3
3 8
4 25
5 92
6 369
7 1626
8 8033
9 42312
10 230081
11 1354190
12 8806769
13 59072860
14 398252833
15 2892141666
16 22862362049
17 182200364944
18 1492258801793
19 13163090657814
20 111357664397265
21 938233188787748
22 11338336523834337

[1,1,3,8,25,92,369,1626,8033,42312,230081,1354190,
 8806769,59072860,398252833,2892141666,22862362049,
 182200364944,1492258801793,13163090657814,
 111357664397265,938233188787748,11338336523834337]

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Last modified July 23 03:00 EDT 2019. Contains 325230 sequences. (Running on oeis4.)