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A197552 as a simple table

n a(n)
1 1
2 1
3 4
4 10
5 36
6 146
7 631
8 2815
9 12987
10 60601
11 286376
12 1364399
13 6546220
14 31585133 

[1,1,4,10,36,146,631,2815,12987,60601,286376,
 1364399,6546220,31585133]

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Last modified April 18 20:26 EDT 2024. Contains 371781 sequences. (Running on oeis4.)