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A147488 as a simple table

n a(n)
1 1
2 1
3 1
4 1
5 1
6 5
7 20
8 49
9 167
10 643
11 3053
12 16577
13 118904
14 896633
15 8867027
16 91561000
17 1224859380
18 17454229913

[1,1,1,1,1,5,20,49,167,643,3053,16577,118904,
 896633,8867027,91561000,1224859380,17454229913]

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Last modified October 18 23:24 EDT 2021. Contains 348070 sequences. (Running on oeis4.)