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A060111 as a simple table

n a(n)
0 1
1 4
2 15
3 56
4 207
5 764
6 2805
7 10288
8 37609
9 137380
10 500655
11 1823440
12 6629423
13 24090332
14 87418221
15 317085352
16 1148825185
17 4160744164
18 15054719697
19 54454345624
20 196805925995
21 711077858188
22 2567375653681
23 9267176552040

[1,4,15,56,207,764,2805,10288,37609,137380,500655,
 1823440,6629423,24090332,87418221,317085352,
 1148825185,4160744164,15054719697,54454345624,
 196805925995,711077858188,2567375653681,
 9267176552040]

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Last modified June 6 13:47 EDT 2024. Contains 373128 sequences. (Running on oeis4.)