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A180899 as a simple table

n a(n)
1 1
2 4
3 22
4 130
5 803
6 5085
7 32747
8 213419
9 1403399
10 9292850
11 61877337
12 413894378
13 2779029389
14 18719276722
15 126438191373
16 856054836170
17 5808041074705
18 39478084788582
19 268776967284806
20 1832579782914892
21 12511376749656415

[1,4,22,130,803,5085,32747,213419,1403399,9292850,
 61877337,413894378,2779029389,18719276722,
 126438191373,856054836170,5808041074705,
 39478084788582,268776967284806,1832579782914892,
 12511376749656415]

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Last modified April 25 01:35 EDT 2024. Contains 371964 sequences. (Running on oeis4.)