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A198916 as a simple table

n a(n)
0 1
1 1
2 4
3 23
4 158
5 1212
6 10058
7 88811
8 826982
9 8085950
10 82922624
11 893003234
12 10129641140
13 121552747370
14 1550460365622
15 21115793548491
16 308004022741254
17 4817224946243142
18 80703099826887368
19 1444218797390453282
20 27501426760092853796
21 554910390616969332656

[1,1,4,23,158,1212,10058,88811,826982,8085950,
 82922624,893003234,10129641140,121552747370,
 1550460365622,21115793548491,308004022741254,
 4817224946243142,80703099826887368,
 1444218797390453282,27501426760092853796,
 554910390616969332656]

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Last modified May 17 08:05 EDT 2022. Contains 353741 sequences. (Running on oeis4.)