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A001821 as a simple table

n a(n)
0 1
1 30
2 1023
3 44473
4 2475473
5 173721912
6 15088541896
7 1593719752240
8 201529405816816
9 30092049283982400
10 5242380158902146624
11 1054368810603158319360
12 242558905724502235934976
13 63305390270900389045395456
14 18607799824329123330114576384 

[1,30,1023,44473,2475473,173721912,15088541896,
 1593719752240,201529405816816,30092049283982400,
 5242380158902146624,1054368810603158319360,
 242558905724502235934976,
 63305390270900389045395456,
 18607799824329123330114576384]

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Last modified June 12 06:07 EDT 2024. Contains 373322 sequences. (Running on oeis4.)