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A128571 as a simple table

n a(n)
0 1
1 2
2 12
3 114
4 1440
5 22368
6 409248
7 8585088
8 202733760
9 5317663680
10 153345634560
11 4821848409600
12 164211751261440
13 6022162697840640
14 236652023784960000
15 9921992082873223680
16 442138176056374548480
17 20869300232695599552000
18 1040210006521640127367680
19 54600929159270409876879360

[1,2,12,114,1440,22368,409248,8585088,202733760,
 5317663680,153345634560,4821848409600,
 164211751261440,6022162697840640,
 236652023784960000,9921992082873223680,
 442138176056374548480,20869300232695599552000,
 1040210006521640127367680,
 54600929159270409876879360]

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Last modified March 2 19:18 EST 2021. Contains 341756 sequences. (Running on oeis4.)