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A095018 as a simple table

n a(n)
1 1
2 0
3 2
4 4
5 17
6 28
7 189
8 531
9 1990
10 5747
11 23902
12 76658
13 291478
14 982793
15 3677580
16 13214719
17 49161612
18 177190667
19 664806798
20 2443387945 

[1,0,2,4,17,28,189,531,1990,5747,23902,76658,
 291478,982793,3677580,13214719,49161612,177190667,
 664806798,2443387945]

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Last modified April 19 21:09 EDT 2024. Contains 371798 sequences. (Running on oeis4.)