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A147918 as a simple table

n a(n)
1 1
2 2
3 6
4 24
5 96
6 376
7 2434
8 16728
9 99960
10 838244
11 7723320
12 62801352
13 674514660
14 7865976872
15 80727212972
16 1056425822904

[1,2,6,24,96,376,2434,16728,99960,838244,7723320,
 62801352,674514660,7865976872,80727212972,
 1056425822904]

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Last modified June 27 03:29 EDT 2022. Contains 354888 sequences. (Running on oeis4.)