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A103305 as a simple table

n a(n)
1 3
2 90
3 210
4 1575
5 2079
6 1261260
7 25740
8 196911
9 24249225
10 21339318
11 4056234
12 1977414075
13 245714175
14 17450721000
15 79342611480
16 5901106728825
17 26253069975
18 17772356037150
19 1723081610250
20 385343705565

[3,90,210,1575,2079,1261260,25740,196911,24249225,
 21339318,4056234,1977414075,245714175,17450721000,
 79342611480,5901106728825,26253069975,
 17772356037150,1723081610250,385343705565]

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Last modified August 3 17:08 EDT 2024. Contains 374895 sequences. (Running on oeis4.)