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A098597 as a simple table

n a(n)
0 1
1 1
2 1
3 5
4 7
5 21
6 33
7 429
8 715
9 2431
10 4199
11 29393
12 52003
13 185725
14 334305
15 9694845
16 17678835
17 64822395
18 119409675
19 883631595
20 1641030105
21 6116566755
22 11435320455
23 171529806825
24 322476036831
25 1215486600363
26 2295919134019
27 17383387729001
28 32968493968795

[1,1,1,5,7,21,33,429,715,2431,4199,29393,52003,
 185725,334305,9694845,17678835,64822395,119409675,
 883631595,1641030105,6116566755,11435320455,
 171529806825,322476036831,1215486600363,
 2295919134019,17383387729001,32968493968795]

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Last modified February 22 13:09 EST 2018. Contains 299454 sequences. (Running on oeis4.)