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A081616 as a simple table

n a(n)
0 0
1 0
2 0
3 1
4 9
5 69
6 510
7 3740
8 27454
9 202321
10 1498074
11 11145324
12 83291428
13 625022772
14 4707757080
15 35579447280
16 269718129308
17 2050317850201
18 15625047614946
19 119347362039788
20 913501931766460
21 7005437509949364
22 53817428069374328
23 414107216180618608

[0,0,0,1,9,69,510,3740,27454,202321,1498074,
 11145324,83291428,625022772,4707757080,
 35579447280,269718129308,2050317850201,
 15625047614946,119347362039788,913501931766460,
 7005437509949364,53817428069374328,
 414107216180618608]

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Last modified April 19 02:45 EDT 2024. Contains 371782 sequences. (Running on oeis4.)