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A243995 as a simple table

n a(n)
1 1
2 18
3 96
4 560
5 720
6 1056
7 1760
8 2000
9 3264
10 7392
11 30960
12 50800
13 172080
14 173440
15 9561600
16 13304064
17 195522560
18 1017856448
19 1026021024
20 1568010240
21 2817884160 

[1,18,96,560,720,1056,1760,2000,3264,7392,30960,
 50800,172080,173440,9561600,13304064,195522560,
 1017856448,1026021024,1568010240,2817884160]

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Last modified April 25 10:47 EDT 2024. Contains 371967 sequences. (Running on oeis4.)