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A103620 as a simple table

na(n)
01
11
21
33
49
545
6225
71575
811130
9100170
10897750
119875250
12108523800
131410809400
1418332414100
15274986211500
164127136413400
1770161319027800
181192076391706200
1922649451442417800
20430247983427262000
219035207651972502000

[1,1,1,3,9,45,225,1575,11130,100170,897750,
 9875250,108523800,1410809400,18332414100,
 274986211500,4127136413400,70161319027800,
 1192076391706200,22649451442417800,
 430247983427262000,9035207651972502000]