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A215363 as a simple table

n a(n)
1 1
2 2
3 12
4 132
5 2040
6 40350
7 974400
8 27805736
9 915505920
10 34160797530
11 1424581678080
12 65660547312492
13 3314551571595264
14 181866769617012662
15 10777121944589844480
16 685937077729538151120
17 46668919680893409361920
18 3380042082757952844150066
19 259638732115410022642483200

[1,2,12,132,2040,40350,974400,27805736,915505920,
 34160797530,1424581678080,65660547312492,
 3314551571595264,181866769617012662,
 10777121944589844480,685937077729538151120,
 46668919680893409361920,3380042082757952844150066,
 259638732115410022642483200]

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Last modified December 7 20:13 EST 2021. Contains 349585 sequences. (Running on oeis4.)