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A121564 as a simple table

n a(n)
1 1
2 2
3 18
4 288
5 180000
6 1620000
7 190591380000
8 780662292480000
9 46097327708651520000
10 28810829817907200000000
11 747278726094210559615027200000000
12 747278726094210559615027200000000 

[1,2,18,288,180000,1620000,190591380000,
 780662292480000,46097327708651520000,
 28810829817907200000000,
 747278726094210559615027200000000,
 747278726094210559615027200000000]

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Last modified May 17 19:53 EDT 2024. Contains 372607 sequences. (Running on oeis4.)