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A334786 as a simple table

n a(n)
0 0
1 3
2 16
3 115
4 950
5 8510
6 80388
7 788392
8 7950930
9 81935425
10 859005840
11 9132977490
12 98240702586
13 1067197649840
14 11691092372000
15 129011823098160
16 1432744619523530
17 16000911127589355
18 179590878292003200
19 2024687100104286525
20 22917687021180660940

[0,3,16,115,950,8510,80388,788392,7950930,
 81935425,859005840,9132977490,98240702586,
 1067197649840,11691092372000,129011823098160,
 1432744619523530,16000911127589355,
 179590878292003200,2024687100104286525,
 22917687021180660940]

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Last modified January 19 16:16 EST 2021. Contains 340270 sequences. (Running on oeis4.)