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A221246 as a simple table

n a(n)
1 0
2 9
3 50
4 484
5 3864
6 32400
7 267264
8 2214144
9 18316800
10 151585344
11 1254325824
12 10379534400
13 85889605824
14 710729930304
15 5881230244800
16 48666696727104
17 402712880117184
18 3332415765326400
19 27575464553486784
20 228184686537228864

[0,9,50,484,3864,32400,267264,2214144,18316800,
 151585344,1254325824,10379534400,85889605824,
 710729930304,5881230244800,48666696727104,
 402712880117184,3332415765326400,
 27575464553486784,228184686537228864]

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Last modified April 17 21:22 EDT 2024. Contains 371767 sequences. (Running on oeis4.)