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A189283 as a simple table

n a(n)
0 1
1 1
2 2
3 6
4 24
5 114
6 628
7 4062
8 30360
9 255186
10 2414292
11 25350954
12 292378968
13 3673917102
14 49928069188
15 729534877758
16 11403682481112
17 189862332575658
18 3354017704180052
19 62654508729565554
20 1233924707891272728
21 25550498290562247438

[1,1,2,6,24,114,628,4062,30360,255186,2414292,
 25350954,292378968,3673917102,49928069188,
 729534877758,11403682481112,189862332575658,
 3354017704180052,62654508729565554,
 1233924707891272728,25550498290562247438]

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Last modified August 5 08:48 EDT 2021. Contains 346464 sequences. (Running on oeis4.)