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A221522 as a simple table

n a(n)
1 0
2 30
3 130
4 900
5 5368
6 33380
7 205080
8 1264378
9 7787228
10 47975704
11 295543282
12 1820672982
13 11216042008
14 69095255496
15 425653839018
16 2622194869596
17 16153749662332
18 99513440156936
19 613041859314376
20 3776578532115986

[0,30,130,900,5368,33380,205080,1264378,7787228,
 47975704,295543282,1820672982,11216042008,
 69095255496,425653839018,2622194869596,
 16153749662332,99513440156936,613041859314376,
 3776578532115986]

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Last modified September 17 14:54 EDT 2024. Contains 375987 sequences. (Running on oeis4.)