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A197960 as a simple table

n a(n)
1 1
2 3
3 7
4 28
5 98
6 432
7 1846
8 8455
9 38764
10 181840
11 858387
12 4093460
13 19635210
14 94757550 

[1,3,7,28,98,432,1846,8455,38764,181840,858387,
 4093460,19635210,94757550]

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Last modified September 22 18:47 EDT 2023. Contains 365531 sequences. (Running on oeis4.)