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A334288 as a simple table

n a(n)
0 1
1 6
2 30
3 180
4 1002
5 6012
6 34224
7 205344
8 1180010
9 7080060
10 40911324
11 245467944
12 1423944024
13 8543664144
14 49710351720
15 298262110320
16 1739627237002
17 10437763422012
18 61002039226716
19 366012235360296
20 2142786218045748
21 12856717308274488
22 75380119335678608

[1,6,30,180,1002,6012,34224,205344,1180010,
 7080060,40911324,245467944,1423944024,8543664144,
 49710351720,298262110320,1739627237002,
 10437763422012,61002039226716,366012235360296,
 2142786218045748,12856717308274488,
 75380119335678608]

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Last modified September 22 17:16 EDT 2020. Contains 337291 sequences. (Running on oeis4.)