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A163922 as a simple table

na(n)
01
16
230
3150
4750
53750
618735
793600
8467640
92336400
1011673000
1158320000
12291375210
131455753000
147273154040
1536337737000
16181548627000
17907043385000
184531720872060
1922641137570400
20113118421225440
21565156109349600

[1,6,30,150,750,3750,18735,93600,467640,2336400,
 11673000,58320000,291375210,1455753000,7273154040,
 36337737000,181548627000,907043385000,
 4531720872060,22641137570400,113118421225440,
 565156109349600]