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A173110 as a simple table

n a(n)
0 1
1 1
2 3
3 6
4 20
5 60
6 230
7 950
8 4420
9 22230
10 120914
11 702820
12 4343860
13 28393280
14 195492054 

[1,1,3,6,20,60,230,950,4420,22230,120914,702820,
 4343860,28393280,195492054]

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Last modified May 6 14:37 EDT 2024. Contains 372294 sequences. (Running on oeis4.)