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A117426 as a simple table

n a(n)
0 1
1 2
2 5
3 15
4 51
5 192
6 781
7 3416
8 15925
9 78596
10 408338
11 2224366
12 12650993
13 74876951
14 459783612
15 2922921342
16 19192162341
17 129864598567
18 903840021982
19 6460209847134
20 47345351199235
21 355305371430876
22 2727065598788861

[1,2,5,15,51,192,781,3416,15925,78596,408338,
 2224366,12650993,74876951,459783612,2922921342,
 19192162341,129864598567,903840021982,
 6460209847134,47345351199235,355305371430876,
 2727065598788861]

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Last modified May 28 18:10 EDT 2024. Contains 372916 sequences. (Running on oeis4.)