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A219975 as a simple table

n a(n)
0 1
1 0
2 1
3 2
4 3
5 28
6 267
7 2744
8 66653
9 2766100
10 141365332
11 13305552648
12 2149055591278 

[1,0,1,2,3,28,267,2744,66653,2766100,141365332,
 13305552648,2149055591278]

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Last modified April 25 03:15 EDT 2024. Contains 371964 sequences. (Running on oeis4.)