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A321961 as a simple table

n a(n)
0 1
1 1
2 2
3 6
4 29
5 205
6 1900
7 21592
8 289325
9 4456773
10 77512394
11 1501537750
12 32053808641
13 747561173689
14 18911411905052
15 515798244940224
16 15088848988966409
17 471291927943037785
18 15655172277281565058
19 551102758946418279862
20 20495154400760992784213
21 802951447375696586076213

[1,1,2,6,29,205,1900,21592,289325,4456773,
 77512394,1501537750,32053808641,747561173689,
 18911411905052,515798244940224,15088848988966409,
 471291927943037785,15655172277281565058,
 551102758946418279862,20495154400760992784213,
 802951447375696586076213]

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Last modified October 20 10:43 EDT 2021. Contains 348100 sequences. (Running on oeis4.)