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A250017 as a simple table

n a(n)
1 20
2 912
3 13512
4 106352
5 558588
6 2224848
7 7259024
8 20384352
9 50937444
10 115954256
11 244606296
12 484335696
13 909078092
14 1630002576
15 2809238304
16 4677097664
17 7553346228
18 11873110032
19 18218051048
20 27353482032
21 40272132252
22 58245315920

[20,912,13512,106352,558588,2224848,7259024,
 20384352,50937444,115954256,244606296,484335696,
 909078092,1630002576,2809238304,4677097664,
 7553346228,11873110032,18218051048,27353482032,
 40272132252,58245315920]

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Last modified April 24 00:30 EDT 2024. Contains 371917 sequences. (Running on oeis4.)