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A225987 as a simple table

n a(n)
1 4
2 48
3 9
4 640
5 390
6 20
7 8960
8 20160
9 3192
10 60
11 129024
12 1106424
13 652784
14 48720
15 45
16 1892352
17 62606544
18 134432480
19 41801760
20 26010
21 420
22 28114944
23 3611217792
24 28244153600
25 36951200000
26 21594300
27 8168160
28 102
29 421724160
30 211096262400

[4,48,9,640,390,20,8960,20160,3192,60,129024,
 1106424,652784,48720,45,1892352,62606544,
 134432480,41801760,26010,420,28114944,3611217792,
 28244153600,36951200000,21594300,8168160,102,
 421724160,211096262400]

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Last modified April 25 11:29 EDT 2024. Contains 371967 sequences. (Running on oeis4.)