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A151515
as a simple table
n
a(n)
1
1
2
1
3
2
4
6
5
15
6
44
7
121
8
353
9
1005
10
2919
11
8398
12
24310
13
70064
14
202225
15
582365
16
1676889
17
4821924
18
13857720
19
39787804
[1,1,2,6,15,44,121,353,1005,2919,8398,24310,70064, 202225,582365,1676889,4821924,13857720,39787804]
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Last modified July 23 21:46 EDT 2024. Contains 374575 sequences. (Running on oeis4.)