A163460 - OEIS

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A163460 as a simple table

n	a(n)
0	1
1	9
2	82
3	754
4	6980
5	64932
6	606152
7	5672648
8	53180944
9	499190928
10	4689836320
11	44087543584
12	414630845504
13	3900665825856
14	36703540792448
15	345415371476096
16	3251026414485760
17	30600669600254208
18	288047075905950208

[1,9,82,754,6980,64932,606152,5672648,53180944, 499190928,4689836320,44087543584,414630845504, 3900665825856,36703540792448,345415371476096, 3251026414485760,30600669600254208, 288047075905950208]