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A246619 as a simple table

n a(n)
0 1
1 20
2 1876
3 229680
4 31497284
5 4600393936
6 699440711760
7 109341854545792
8 17445620031680100
9 2827280025640259280
10 463882742476664594512
11 76875122571167921990080
12 12845419277094419018993808
13 2161338658294952555703260480
14 365816910931667192749720139072 

[1,20,1876,229680,31497284,4600393936,
 699440711760,109341854545792,17445620031680100,
 2827280025640259280,463882742476664594512,
 76875122571167921990080,
 12845419277094419018993808,
 2161338658294952555703260480,
 365816910931667192749720139072]

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Last modified August 14 07:04 EDT 2020. Contains 336477 sequences. (Running on oeis4.)