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A017918 as a simple table

n a(n)
0 1
1 20
2 289
3 3740
4 46321
5 563300
6 6797569
7 81762860
8 982121041
9 11790305780
10 141507994849
11 1698217742780
12 20379222467761
13 244553718979460
14 2934659879368129
15 35215994824839500
16 422592319303230481

[1,20,289,3740,46321,563300,6797569,81762860,
 982121041,11790305780,141507994849,1698217742780,
 20379222467761,244553718979460,2934659879368129,
 35215994824839500,422592319303230481]

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Last modified July 11 22:52 EDT 2020. Contains 335652 sequences. (Running on oeis4.)