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A078665 as a simple table

na(n)
11
21
32
45
547
6105
71272
88424
955856
10388800
116592492
1237965600
131573051680
1410106845824
15145938179520
162694653982720
1718948491739696
18267048208800000
1923293245955795200
20466687809894297600
213372079713556377600

[1,1,2,5,47,105,1272,8424,55856,388800,6592492,
 37965600,1573051680,10106845824,145938179520,
 2694653982720,18948491739696,267048208800000,
 23293245955795200,466687809894297600,
 3372079713556377600]