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A331850 as a simple table

na(n)
11
22
34
49
518
654
7120
8324
9900
102406
116400
1219600
1350176
14148042
15442325
161373070
173954113

[1,2,4,9,18,54,120,324,900,2406,6400,19600,50176,
 148042,442325,1373070,3954113]