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A196881 as a simple table

n a(n)
0 1
1 1
2 3
3 23
4 132
5 729
6 3987
7 18687
8 82350
9 342383
10 1295579
11 4634280
12 15873501
13 51143461
14 156932559
15 463212189
16 1309275981
17 3576241449
18 9484669665
19 24306269493
20 60475548510
21 146630200929
22 345755185335
23 796397380425
24 1797676089003
25 3970398558042
26 8602390112508

[1,1,3,23,132,729,3987,18687,82350,342383,1295579,
 4634280,15873501,51143461,156932559,463212189,
 1309275981,3576241449,9484669665,24306269493,
 60475548510,146630200929,345755185335,
 796397380425,1797676089003,3970398558042,
 8602390112508]

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Last modified June 24 20:32 EDT 2022. Contains 354830 sequences. (Running on oeis4.)