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A273489 as a simple table

n a(n)
0 1
1 5
2 21
3 85
4 413
5 1765
6 7325
7 30085
8 122813
9 499045
10 2020445
11 8156485
12 32854013
13 132108325
14 530526365
15 2128417285 

[1,5,21,85,413,1765,7325,30085,122813,499045,
 2020445,8156485,32854013,132108325,530526365,
 2128417285]

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Last modified April 24 08:28 EDT 2024. Contains 371927 sequences. (Running on oeis4.)