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A004167 as a simple table

n a(n)
0 1
1 3
2 9
3 72
4 18
5 342
6 927
7 7812
8 1656
9 38691
10 94095
11 741771
12 144135
13 3234951
14 9692874
15 70984341
16 12764034
17 361041921
18 984024783
19 7641622611
20 1044876843
21 30235306401
22 90695018313
23 72887134149
24 184635924282
25 344906882748
26 9238285681452
27 7894847955267

[1,3,9,72,18,342,927,7812,1656,38691,94095,741771,
 144135,3234951,9692874,70984341,12764034,
 361041921,984024783,7641622611,1044876843,
 30235306401,90695018313,72887134149,184635924282,
 344906882748,9238285681452,7894847955267]

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Last modified March 19 11:10 EDT 2019. Contains 321329 sequences. (Running on oeis4.)