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A157540 as a simple table

n a(n)
2 1
3 3
4 6
5 430
6 8775
7 114681
8 1213471
9 11685663
10 110201400
11 997307245
12 8767514811
13 75092781699
14 615909156954
15 4807634283375
16 35885733707970
17 258099905201634
18 1799253706774203
19 12198525957520155
20 80576646822300850
21 518883888358457370

[1,3,6,430,8775,114681,1213471,11685663,110201400,
 997307245,8767514811,75092781699,615909156954,
 4807634283375,35885733707970,258099905201634,
 1799253706774203,12198525957520155,
 80576646822300850,518883888358457370]

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Last modified August 12 16:32 EDT 2022. Contains 356077 sequences. (Running on oeis4.)