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A247452 as a simple table

n a(n)
0 1
1 3
2 18
3 135
4 1215
5 12636
6 147987
7 1917999
8 27162540
9 416236401
10 6848207775
11 120206639790
12 2239278203277
13 44074161731151
14 913065539247018
15 19843943547060315
16 451135755042249987
17 10701182793462338052
18 264250529777677991751
19 6779171511882363638619
20 180350988089950776032172 

[1,3,18,135,1215,12636,147987,1917999,27162540,
 416236401,6848207775,120206639790,2239278203277,
 44074161731151,913065539247018,19843943547060315,
 451135755042249987,10701182793462338052,
 264250529777677991751,6779171511882363638619,
 180350988089950776032172]

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Last modified July 19 00:30 EDT 2024. Contains 374388 sequences. (Running on oeis4.)