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A105457 as a simple table

n a(n)
1 0
2 0
3 0
4 1
5 6
6 21
7 66
8 170
9 404
10 984
11 2384
12 5877
13 14459
14 36720
15 92657
16 234376
17 597082
18 1525209
19 3913689
20 10076194
21 26016985 

[0,0,0,1,6,21,66,170,404,984,2384,5877,14459,
 36720,92657,234376,597082,1525209,3913689,
 10076194,26016985]

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Last modified August 19 07:15 EDT 2024. Contains 375284 sequences. (Running on oeis4.)