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A128326 as a simple table

n a(n)
0 1
1 1
2 3
3 12
4 57
5 305
6 1787
7 11269
8 75629
9 535960
10 3987913
11 31021693
12 251445581
13 2117993712
14 18499513147
15 167246537937
16 1562556275281
17 15066167302802
18 149737897716757
19 1532313152898208
20 16129331500727047

[1,1,3,12,57,305,1787,11269,75629,535960,3987913,
 31021693,251445581,2117993712,18499513147,
 167246537937,1562556275281,15066167302802,
 149737897716757,1532313152898208,
 16129331500727047]

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Last modified March 31 11:51 EDT 2023. Contains 361648 sequences. (Running on oeis4.)