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A188519 as a simple table

n a(n)
1 20
2 400
3 4143
4 40230
5 342240
6 2800798
7 22015314
8 169875850
9 1291198707
10 9730141740
11 72859323174
12 543367409130
13 4040626627139
14 29988912453443
15 222268109960222
16 1645817547627269
17 12178540896840119
18 90075084742836021

[20,400,4143,40230,342240,2800798,22015314,
 169875850,1291198707,9730141740,72859323174,
 543367409130,4040626627139,29988912453443,
 222268109960222,1645817547627269,
 12178540896840119,90075084742836021]

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Last modified June 28 17:31 EDT 2022. Contains 354907 sequences. (Running on oeis4.)