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A221101 as a simple table

n a(n)
0 1
1 1
2 2
3 12
4 144
5 3160
6 118380
7 7174188
8 692356896
9 104696597808
10 24680489921280
11 9010186432576560
12 5073501307520289600
13 4385657278007399474496
14 5797249519065509217375936
15 11674185903250032386477342880
16 35692663320428574506107140979200

[1,1,2,12,144,3160,118380,7174188,692356896,
 104696597808,24680489921280,9010186432576560,
 5073501307520289600,4385657278007399474496,
 5797249519065509217375936,
 11674185903250032386477342880,
 35692663320428574506107140979200]

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Last modified December 8 01:08 EST 2022. Contains 358671 sequences. (Running on oeis4.)