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A001447 as a simple table

n a(n)
0 1
1 3
2 15
3 65
4 325
5 1575
6 7875
7 39125
8 195625
9 976875
10 4884375
11 24415625
12 122078125
13 610359375
14 3051796875
15 15258828125
16 76294140625
17 381469921875
18 1907349609375
19 9536744140625
20 47683720703125

[1,3,15,65,325,1575,7875,39125,195625,976875,
 4884375,24415625,122078125,610359375,3051796875,
 15258828125,76294140625,381469921875,
 1907349609375,9536744140625,47683720703125]

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Last modified June 7 05:40 EDT 2024. Contains 373144 sequences. (Running on oeis4.)