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A063778 as a simple table

n a(n)
1 3
2 6
3 15
4 36
5 225
6 561
7 1225
8 11935
9 11781
10 27405
11 220780
12 203841
13 3368925
14 4921840
15 7316001
16 33631521
17 142629201
18 879207616
19 1383958576
20 3800798001
21 12524486976
22 181285005825
23 118037679760
24 239764947345
25 738541591425
26 1289707733601
27 1559439365121

[3,6,15,36,225,561,1225,11935,11781,27405,220780,
 203841,3368925,4921840,7316001,33631521,142629201,
 879207616,1383958576,3800798001,12524486976,
 181285005825,118037679760,239764947345,
 738541591425,1289707733601,1559439365121]

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Last modified April 24 17:10 EDT 2024. Contains 371962 sequences. (Running on oeis4.)