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A279853 as a simple table

n a(n)
1 2
2 24
3 168
4 972
5 5200
6 26632
7 134898
8 668668
9 3278294
10 15902088
11 76515244
12 365585432
13 1736575416
14 8206953072
15 38615236370
16 180986296644
17 845359203352
18 3936439186972
19 18279759467004
20 84675466304900
21 391350188916098

[2,24,168,972,5200,26632,134898,668668,3278294,
 15902088,76515244,365585432,1736575416,8206953072,
 38615236370,180986296644,845359203352,
 3936439186972,18279759467004,84675466304900,
 391350188916098]

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Last modified October 31 00:25 EDT 2020. Contains 338095 sequences. (Running on oeis4.)