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A003613 as a simple table

n a(n)
1 1
2 6
3 12
4 96
5 1560
6 4848
7 28848
8 248352
9 1446240
10 12905664
11 99071040
12 649236480
13 4924099200
14 49007023872
15 304778309376
16 2301818168832
17 18389782387200
18 138110895596544
19 1094304243348480
20 8691945066848256
21 68039592521668608

[1,6,12,96,1560,4848,28848,248352,1446240,
 12905664,99071040,649236480,4924099200,
 49007023872,304778309376,2301818168832,
 18389782387200,138110895596544,1094304243348480,
 8691945066848256,68039592521668608]

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Last modified April 17 22:23 EDT 2024. Contains 371767 sequences. (Running on oeis4.)