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A001147 as a simple table

n a(n)
0 1
1 1
2 3
3 15
4 105
5 945
6 10395
7 135135
8 2027025
9 34459425
10 654729075
11 13749310575
12 316234143225
13 7905853580625
14 213458046676875
15 6190283353629375
16 191898783962510625
17 6332659870762850625
18 221643095476699771875
19 8200794532637891559375

[1,1,3,15,105,945,10395,135135,2027025,34459425,
 654729075,13749310575,316234143225,7905853580625,
 213458046676875,6190283353629375,
 191898783962510625,6332659870762850625,
 221643095476699771875,8200794532637891559375]

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Last modified November 21 07:38 EST 2018. Contains 317427 sequences. (Running on oeis4.)