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A057730
as a simple table
n
a(n)
1
0
2
1
3
1
4
3
5
6
6
25
7
86
8
416
9
1988
10
10640
11
57987
12
328956
13
1900321
14
11204350
15
67042778
16
406780346
[0,1,1,3,6,25,86,416,1988,10640,57987,328956, 1900321,11204350,67042778,406780346]
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Last modified August 28 11:32 EDT 2024. Contains 375502 sequences. (Running on oeis4.)