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A058540 as a simple table

n a(n)
0 0
1 1
2 3
3 9
4 36
5 144
6 651
7 3015
8 14634
9 72654
10 369063
11 1904985
12 9971889
13 52788393
14 282161025
15 1520597895
16 8253281871
17 45075359277
18 247534382298
19 1365994896264
20 7571065357620
21 42127865408028
22 235246997219400
23 1317894484506336

[0,1,3,9,36,144,651,3015,14634,72654,369063,
 1904985,9971889,52788393,282161025,1520597895,
 8253281871,45075359277,247534382298,1365994896264,
 7571065357620,42127865408028,235246997219400,
 1317894484506336]

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Last modified April 24 20:08 EDT 2024. Contains 371963 sequences. (Running on oeis4.)