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A154999 as a simple table

n a(n)
0 1
1 1
2 13
3 133
4 1477
5 15925
6 173509
7 1883413
8 20471269
9 222402229
10 2416608901
11 26257155925
12 285297665317
13 3099884206069
14 33681691385797
15 365966976355477
16 3976399872691813
17 43205412115772725
18 469446679463465221

[1,1,13,133,1477,15925,173509,1883413,20471269,
 222402229,2416608901,26257155925,285297665317,
 3099884206069,33681691385797,365966976355477,
 3976399872691813,43205412115772725,
 469446679463465221]

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Last modified April 21 10:55 EDT 2019. Contains 322328 sequences. (Running on oeis4.)