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A027142 as a simple table

n a(n)
2 12
3 105
4 831
5 6648
6 53545
7 434458
8 3548871
9 29166324
10 241006333
11 2001145585
12 16688238416
13 139711675493
14 1173762075101
15 9892582661593
16 83617537623039
17 708654873428000
18 6020421349942965
19 51261344063828713
20 437370998284452284
21 3738875265960650016 

[12,105,831,6648,53545,434458,3548871,29166324,
 241006333,2001145585,16688238416,139711675493,
 1173762075101,9892582661593,83617537623039,
 708654873428000,6020421349942965,
 51261344063828713,437370998284452284,
 3738875265960650016]

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Last modified May 12 17:59 EDT 2024. Contains 372493 sequences. (Running on oeis4.)