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A199095 as a simple table

n a(n)
1 1
2 6
3 15
4 280
5 2040
6 5503
7 113010
8 857532
9 2340127
10 50784920
11 395160694
12 1085939598
13 24341903776
14 192371505064
15 530944513322
16 12155425553076
17 97080455287086
18 268728663225260
19 6244348288426664
20 50251726336557552

[1,6,15,280,2040,5503,113010,857532,2340127,
 50784920,395160694,1085939598,24341903776,
 192371505064,530944513322,12155425553076,
 97080455287086,268728663225260,6244348288426664,
 50251726336557552]

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Last modified April 19 16:21 EDT 2024. Contains 371794 sequences. (Running on oeis4.)