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A366638 as a simple table

n a(n)
0 3
1 15
2 93
3 660
4 3606
5 34560
6 236964
7 1559520
8 9155916
9 77423280
10 530807472
11 3868683120
12 21224771760
13 185094572580
14 1261494915594
15 9988783073280
16 49990612274316
17 436182213726030
18 3279858902194056
19 21372989348391720
20 122709716651985624
21 1082323574100172800 

[3,15,93,660,3606,34560,236964,1559520,9155916,
 77423280,530807472,3868683120,21224771760,
 185094572580,1261494915594,9988783073280,
 49990612274316,436182213726030,3279858902194056,
 21372989348391720,122709716651985624,
 1082323574100172800]

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Last modified May 19 03:29 EDT 2024. Contains 372666 sequences. (Running on oeis4.)