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A203197 as a simple table

n a(n)
1 1
2 4
3 39
4 1080
5 88209
6 21493836
7 15683355351
8 34309958505840
9 225130514549271201
10 4431394012508602048404
11 261672339357326993189906439
12 46354644349343413982791427120040
13 24634789450813795903041020740742981169

[1,4,39,1080,88209,21493836,15683355351,
 34309958505840,225130514549271201,
 4431394012508602048404,
 261672339357326993189906439,
 46354644349343413982791427120040,
 24634789450813795903041020740742981169]

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Last modified August 2 20:05 EDT 2021. Contains 346428 sequences. (Running on oeis4.)