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A074561 as a simple table

n a(n)
0 3
1 15
2 77
3 405
4 2177
5 11925
6 66377
7 374445
8 2135777
9 12292965
10 71280377
11 415819485
12 2437700177
13 14348506005
14 84736115177
15 501776304525
16 2977992765377
17 17706778767045
18 105443373410777
19 628708104245565

[3,15,77,405,2177,11925,66377,374445,2135777,
 12292965,71280377,415819485,2437700177,
 14348506005,84736115177,501776304525,
 2977992765377,17706778767045,105443373410777,
 628708104245565]

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Last modified March 28 05:39 EDT 2024. Contains 371235 sequences. (Running on oeis4.)