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A087638 as a simple table

n a(n)
1 0
2 18
3 99
4 1638
5 22095
6 264312
7 3159111
8 36694950
9 418286661

[0,18,99,1638,22095,264312,3159111,36694950,
 418286661]

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Last modified July 30 07:58 EDT 2021. Contains 346348 sequences. (Running on oeis4.)