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A297872 as a simple table

n a(n)
1 0
2 2
3 3
4 10
5 20
6 68
7 185
8 561
9 1588
10 4814
11 14322
12 42658
13 127606
14 381695
15 1142358
16 3419569
17 10243325
18 30685488
19 91937645
20 275496007
21 825602377
22 2474298468
23 7415685876
24 22226227933
25 66617647655
26 199673303891
27 598488700247

[0,2,3,10,20,68,185,561,1588,4814,14322,42658,
 127606,381695,1142358,3419569,10243325,30685488,
 91937645,275496007,825602377,2474298468,
 7415685876,22226227933,66617647655,199673303891,
 598488700247]

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Last modified July 23 22:20 EDT 2021. Contains 346265 sequences. (Running on oeis4.)