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A189879 as a simple table

na(n)
11
20
30
42
52
64
728
80
920
1020
11180
12520
131888
146016
1522480
16105236
17433500
181933604
199687268
2050998366
21269523272
221507984008

[1,0,0,2,2,4,28,0,20,20,180,520,1888,6016,22480,
 105236,433500,1933604,9687268,50998366,269523272,
 1507984008]