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A000402 as a simple table

n a(n)
1 0
2 0
3 1
4 6
5 41
6 293
7 2309
8 19975
9 189524
10 1960041
11 21993884
12 266361634
13 3465832370
14 48245601976
15 715756932697
16 11277786883720
17 188135296651083
18 3313338641692957
19 61444453534759589
20 1196988740015236617
21 24442368179977776766
22 522124104504306695929

[0,0,1,6,41,293,2309,19975,189524,1960041,
 21993884,266361634,3465832370,48245601976,
 715756932697,11277786883720,188135296651083,
 3313338641692957,61444453534759589,
 1196988740015236617,24442368179977776766,
 522124104504306695929]

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Last modified April 19 21:09 EDT 2024. Contains 371798 sequences. (Running on oeis4.)