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A090753 as a simple table

n a(n)
0 1
1 2
2 2
3 4
4 16
5 88
6 600
7 4800
8 43680
9 443296
10 4949920
11 60217408
12 792134528
13 11200176128
14 169375195136
15 2728019576832
16 46626359376384
17 842947307334144
18 16073131554826752
19 322403473258650624
20 6786861273524305920

[1,2,2,4,16,88,600,4800,43680,443296,4949920,
 60217408,792134528,11200176128,169375195136,
 2728019576832,46626359376384,842947307334144,
 16073131554826752,322403473258650624,
 6786861273524305920]

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Last modified April 19 07:38 EDT 2024. Contains 371782 sequences. (Running on oeis4.)