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A225989 as a simple table

n a(n)
1 20
2 3192
3 652784
4 134432480
5 28244153600
6 6052498776192
7 1314942362273280
8 288501497813552640
9 63776322167821168640
10 14182989297327325110272
11 3169467786802943379238912
12 711136363409644515952173056 

[20,3192,652784,134432480,28244153600,
 6052498776192,1314942362273280,288501497813552640,
 63776322167821168640,14182989297327325110272,
 3169467786802943379238912,
 711136363409644515952173056]

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Last modified April 25 12:14 EDT 2024. Contains 371969 sequences. (Running on oeis4.)