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A371407 as a simple table

na(n)
01
18
286
31064
414289
5202488
62980380
745122792
8698214548
910993069856
10175546104958
112836384141720
1246285381498750
13761735217877200
1412628402069223160
15210704642400488040
163535494883741420908
1759621314428576557664
181009942893735988354296

[1,8,86,1064,14289,202488,2980380,45122792,
 698214548,10993069856,175546104958,2836384141720,
 46285381498750,761735217877200,12628402069223160,
 210704642400488040,3535494883741420908,
 59621314428576557664,1009942893735988354296]