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A217906 as a simple table

n a(n)
0 1
1 1
2 3
3 19
4 223
5 4019
6 98071
7 3012595
8 111408735
9 4813926235
10 237893755847
11 13230156372931
12 817650834368367
13 55588558619887179
14 4122802071853330711
15 331247290236326404499
16 28660436738240190615167
17 2656810905539387715877787
18 262694577305483845458361767

[1,1,3,19,223,4019,98071,3012595,111408735,
 4813926235,237893755847,13230156372931,
 817650834368367,55588558619887179,
 4122802071853330711,331247290236326404499,
 28660436738240190615167,2656810905539387715877787,
 262694577305483845458361767]

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Last modified May 5 04:35 EDT 2024. Contains 372257 sequences. (Running on oeis4.)