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A111997 as a simple table

n a(n)
0 1
1 9
2 63
3 399
4 2403
5 14067
6 80949
7 460845
8 2605590
9 14666470
10 82320714
11 461238282
12 2581644378
13 14442658074
14 80785970838
15 451934259654
16 2528977211775
17 14157983986839
18 79302044283297
19 444448115168049
20 2492468172937125

[1,9,63,399,2403,14067,80949,460845,2605590,
 14666470,82320714,461238282,2581644378,
 14442658074,80785970838,451934259654,
 2528977211775,14157983986839,79302044283297,
 444448115168049,2492468172937125]

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Last modified August 26 21:09 EDT 2024. Contains 375462 sequences. (Running on oeis4.)