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A109787 as a simple table

n a(n)
0 1
1 2
2 3
3 4
4 21
5 58
6 151
7 392
8 1037
9 2718
10 7115
11 18624
12 48769
13 127682
14 334275
15 875140
16 2291157
17 5998330
18 15703831
19 41113160
20 107635661
21 281793822
22 737745803
23 1931443584
24 5056584961
25 13238311298
26 34658348931
27 90736735492
28 237551857557

[1,2,3,4,21,58,151,392,1037,2718,7115,18624,48769,
 127682,334275,875140,2291157,5998330,15703831,
 41113160,107635661,281793822,737745803,1931443584,
 5056584961,13238311298,34658348931,90736735492,
 237551857557]

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Last modified April 16 12:05 EDT 2024. Contains 371711 sequences. (Running on oeis4.)