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A057152
as a simple table
n
a(n)
0
1
1
2
2
15
3
83
4
545
5
3493
6
24006
7
169419
8
1249225
9
9542846
10
75621458
11
620011391
12
5253319121
[1,2,15,83,545,3493,24006,169419,1249225,9542846, 75621458,620011391,5253319121]
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Last modified May 6 13:11 EDT 2024. Contains 372293 sequences. (Running on oeis4.)
