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A220824 as a simple table

n a(n)
1 4
2 10
3 60
4 430
5 3396
6 28818
7 256172
8 2357138
9 22253672
10 214370398
11 2098593628
12 20817790876
13 208801698676
14 2113957366698
15 21574762692484
16 221729081428478
17 2292720460828372
18 23835381083324608
19 248987501825970604
20 2612160344953154508
21 27510833867426222908

[4,10,60,430,3396,28818,256172,2357138,22253672,
 214370398,2098593628,20817790876,208801698676,
 2113957366698,21574762692484,221729081428478,
 2292720460828372,23835381083324608,
 248987501825970604,2612160344953154508,
 27510833867426222908]

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Last modified April 23 12:08 EDT 2024. Contains 371912 sequences. (Running on oeis4.)