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A371068 as a simple table

na(n)
01
11
20
30
424
5360
62160
77560
8241920
98164800
10145756800
111736380800
1234488115200
131416906691200
1446117316044800
151085696644032000
1626627911620710400
171054301997805056000
1846867776416068608000
191726488804870679449600
2058404671366139850752000

[1,1,0,0,24,360,2160,7560,241920,8164800,
 145756800,1736380800,34488115200,1416906691200,
 46117316044800,1085696644032000,26627911620710400,
 1054301997805056000,46867776416068608000,
 1726488804870679449600,58404671366139850752000]