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A026892 as a simple table

n a(n)
4 1
5 19
6 220
7 2021
8 16246
9 119914
10 835080
11 5579147
12 36150820
13 228879616
14 1423367610
15 8727874180
16 52919787978
17 317969615146
18 1896431659490
19 11241964305405
20 66305996581006
21 389432443869294
22 2279159225280808

[1,19,220,2021,16246,119914,835080,5579147,
 36150820,228879616,1423367610,8727874180,
 52919787978,317969615146,1896431659490,
 11241964305405,66305996581006,389432443869294,
 2279159225280808]

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Last modified October 27 15:20 EDT 2021. Contains 348287 sequences. (Running on oeis4.)