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A094070 as a simple table

n a(n)
0 1
1 4
2 20
3 150
4 1352
5 15428
6 203464
7 3162960
8 55405140
9 1101298600
10 24222234720
11 590544046744
12 15715973012248
13 456341011254560
14 14312979247985120
15 484253161428902192
16 17550722413456774848
17 680244627812139042016
18 28053748582811428182080
19 1228896901162555453603712

[1,4,20,150,1352,15428,203464,3162960,55405140,
 1101298600,24222234720,590544046744,
 15715973012248,456341011254560,14312979247985120,
 484253161428902192,17550722413456774848,
 680244627812139042016,28053748582811428182080,
 1228896901162555453603712]

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Last modified April 23 16:40 EDT 2024. Contains 371916 sequences. (Running on oeis4.)