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A060072 as a simple table

n a(n)
1 0
2 1
3 4
4 21
5 156
6 1555
7 19608
8 299593
9 5380840
10 111111111
11 2593742460
12 67546215517
13 1941507093540
14 61054982558011
15 2085209001813616
16 76861433640456465
17 3041324492229179280
18 128583032925805678351
19 5784852794328402307380
20 275941052631578947368421

[0,1,4,21,156,1555,19608,299593,5380840,111111111,
 2593742460,67546215517,1941507093540,
 61054982558011,2085209001813616,76861433640456465,
 3041324492229179280,128583032925805678351,
 5784852794328402307380,275941052631578947368421]

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Last modified April 25 12:27 EDT 2024. Contains 371969 sequences. (Running on oeis4.)