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A223866 as a simple table

n a(n)
1 20
2 400
3 4884
4 41682
5 273959
6 1477240
7 6818350
8 27746619
9 101698292
10 341120712
11 1060013078
12 3081189588
13 8443340635
14 21952389700
15 54443494785
16 129382581759
17 295772387822
18 652604111790
19 1393875593290
20 2889329636208
21 5825806879833

[20,400,4884,41682,273959,1477240,6818350,
 27746619,101698292,341120712,1060013078,
 3081189588,8443340635,21952389700,54443494785,
 129382581759,295772387822,652604111790,
 1393875593290,2889329636208,5825806879833]

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Last modified January 19 06:18 EST 2022. Contains 350464 sequences. (Running on oeis4.)