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A088989 as a simple table

n a(n)
1 1
2 3
3 15
4 105
5 315
6 3465
7 675675
8 2027025
9 241215975
10 587577375
11 138881925
12 1581170716125
13 140480936701875
14 219150261254925
15 32785574798851875
16 106717045970262853125
17 1424703093055003125
18 33615869480632798734375

[1,3,15,105,315,3465,675675,2027025,241215975,
 587577375,138881925,1581170716125,140480936701875,
 219150261254925,32785574798851875,
 106717045970262853125,1424703093055003125,
 33615869480632798734375]

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Last modified October 22 16:15 EDT 2021. Contains 348174 sequences. (Running on oeis4.)