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A305404 as a simple table

n a(n)
0 1
1 1
2 4
3 25
4 217
5 2416
6 32839
7 527185
8 9761602
9 204800551
10 4801461049
11 124402647370
12 3529848676237
13 108859319101261
14 3625569585663484
15 129689000146431205
16 4958830249864725997
17 201834650901695603296
18 8712774828941647677019
19 397596632650906687905565

[1,1,4,25,217,2416,32839,527185,9761602,204800551,
 4801461049,124402647370,3529848676237,
 108859319101261,3625569585663484,
 129689000146431205,4958830249864725997,
 201834650901695603296,8712774828941647677019,
 397596632650906687905565]

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Last modified April 9 03:15 EDT 2020. Contains 333343 sequences. (Running on oeis4.)