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A220438 as a simple table

n a(n)
0 3
1 14
2 170
3 1152
4 10326
5 78963
6 656624
7 5213426
8 42439104
9 340790424
10 2756911059
11 22212987398
12 179367321962
13 1446643119600
14 11675121964830
15 94190699548803
16 760042877382104
17 6132290825573090
18 49480275246158592
19 399234462516292656
20 3221300621136623523
21 25991449993525766654
22 209716174247167839146

[3,14,170,1152,10326,78963,656624,5213426,
 42439104,340790424,2756911059,22212987398,
 179367321962,1446643119600,11675121964830,
 94190699548803,760042877382104,6132290825573090,
 49480275246158592,399234462516292656,
 3221300621136623523,25991449993525766654,
 209716174247167839146]

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Last modified January 24 13:52 EST 2020. Contains 331194 sequences. (Running on oeis4.)