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A021774 as a simple table

n a(n)
0 1
1 20
2 271
3 3150
4 34041
5 354480
6 3620611
7 36607010
8 368161981
9 3692428740
10 36979730151
11 370080107670
12 3702237477121
13 37029646251800
14 370333177834891
15 3703516786589130
16 37036098633715461
17 370365663082767660

[1,20,271,3150,34041,354480,3620611,36607010,
 368161981,3692428740,36979730151,370080107670,
 3702237477121,37029646251800,370333177834891,
 3703516786589130,37036098633715461,
 370365663082767660]

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Last modified May 2 21:21 EDT 2024. Contains 372203 sequences. (Running on oeis4.)