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A352801 as a simple table

na(n)
01
11
22
34
416
5170
6360
7840
882320
9181440
101512000
1119958400
1279833600
13259459200
1414529715200

[1,1,2,4,16,170,360,840,82320,181440,1512000,
 19958400,79833600,259459200,14529715200]