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A218382 as a simple table

n a(n)
1 1
2 3
3 48
4 828
5 8820
6 26100
7 417600
8 2114100
9 3009600
10 43864128
11 200278848
12 1013911668
13 7823392500
14 16222586688
15 259561387008
16 633694792500
17 4152982192128

[1,3,48,828,8820,26100,417600,2114100,3009600,
 43864128,200278848,1013911668,7823392500,
 16222586688,259561387008,633694792500,
 4152982192128]

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Last modified November 27 12:51 EST 2021. Contains 349394 sequences. (Running on oeis4.)