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A328299 as a simple table

n a(n)
0 1
1 1
2 3
3 12
4 41
5 179
6 909
7 3968
8 19680
9 106368
10 516905
11 2717631
12 15139485
13 77813569
14 422589823
15 2395441908
16 12734635078
17 70577595746
18 404540380566
19 2199035619696
20 12356298623126
21 71368686011040
22 394076753535029
23 2236273925952447
24 12988459939106601

[1,1,3,12,41,179,909,3968,19680,106368,516905,
 2717631,15139485,77813569,422589823,2395441908,
 12734635078,70577595746,404540380566,
 2199035619696,12356298623126,71368686011040,
 394076753535029,2236273925952447,
 12988459939106601]

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Last modified June 14 05:51 EDT 2021. Contains 345018 sequences. (Running on oeis4.)