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A090728 as a simple table

na(n)
02
120
2398
37940
4158402
53160100
663043598
71257711860
825091193602
9500566160180
109986232009998
11199224074039780
123974495248785602
1379290680901672260
141581839122784659598
1531557491774791519700
16629567996373045734402
1712559802435686123168340

[2,20,398,7940,158402,3160100,63043598,1257711860,
 25091193602,500566160180,9986232009998,
 199224074039780,3974495248785602,
 79290680901672260,1581839122784659598,
 31557491774791519700,629567996373045734402,
 12559802435686123168340]