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A147057 as a simple table

n a(n)
1 1
2 1
3 1
4 1
5 1
6 1
7 3
8 15
9 43
10 67
11 135
12 405
13 1643
14 5861
15 31427
16 120095
17 674029
18 3441725
19 24151139
20 153308175
21 1325530085 

[1,1,1,1,1,1,3,15,43,67,135,405,1643,5861,31427,
 120095,674029,3441725,24151139,153308175,
 1325530085]

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Last modified August 12 16:32 EDT 2022. Contains 356077 sequences. (Running on oeis4.)