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A167559 as a simple table

na(n)
11
25
346
4598
510056
6207960
75111856
8145721520
94728528000
10172134253440
116948393580800
12308058678385920
1314882061698380800
14778136819786726400
1543783908789625804800
162638014817853286144000
17169455373956672285081600

[1,5,46,598,10056,207960,5111856,145721520,
 4728528000,172134253440,6948393580800,
 308058678385920,14882061698380800,
 778136819786726400,43783908789625804800,
 2638014817853286144000,169455373956672285081600]