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A147250 as a simple table

n a(n)
1 1
2 1
3 1
4 1
5 1
6 3
7 7
8 15
9 31
10 125
11 537
12 2497
13 11379
14 73403
15 564557
16 5044749
17 48150503
18 565823439
19 7944991263
20 131881718303
21 2468412664385 

[1,1,1,1,1,3,7,15,31,125,537,2497,11379,73403,
 564557,5044749,48150503,565823439,7944991263,
 131881718303,2468412664385]

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Last modified June 1 20:24 EDT 2023. Contains 363078 sequences. (Running on oeis4.)