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A229687 as a simple table

n a(n)
1 1
2 9
3 20457529
4 143784081
5 331130809
6 4365905625
7 5216450625
8 20074072489
9 1193532215121
10 10036851273801
11 36014509461681
12 38767247532225
13 41413201925481
14 155991531977649
15 320642706437001
16 2543173099393689
17 2696589987547401
18 4665141483989281
19 87463589042698969

[1,9,20457529,143784081,331130809,4365905625,
 5216450625,20074072489,1193532215121,
 10036851273801,36014509461681,38767247532225,
 41413201925481,155991531977649,320642706437001,
 2543173099393689,2696589987547401,
 4665141483989281,87463589042698969]

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Last modified April 24 04:14 EDT 2024. Contains 371918 sequences. (Running on oeis4.)