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A263745 as a simple table

n a(n)
0 1
1 1
2 2
3 6
4 24
5 120
6 720
7 2400
8 5424
9 11568
10 26796
11 68966
12 198332
13 558032
14 1509568
15 3898288
16 9694608
17 23885448
18 59953920
19 152383072
20 389677200
21 996510496 

[1,1,2,6,24,120,720,2400,5424,11568,26796,68966,
 198332,558032,1509568,3898288,9694608,23885448,
 59953920,152383072,389677200,996510496]

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Last modified August 22 20:44 EDT 2024. Contains 375369 sequences. (Running on oeis4.)