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A008270 as a simple table

n a(n)
1 1
2 20
3 507
4 19552
5 1113485
6 88725876
7 9452410135
8 1299140690912
9 223938108997497
10 47323772172058420
11 12033854264863090451
12 3625294706255832787200
13 1276951433895343148472517

[1,20,507,19552,1113485,88725876,9452410135,
 1299140690912,223938108997497,47323772172058420,
 12033854264863090451,3625294706255832787200,
 1276951433895343148472517]

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Last modified May 22 22:13 EDT 2022. Contains 353959 sequences. (Running on oeis4.)