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A328552 as a simple table

na(n)
10
20
30
4378
590027
62931831
733720354
8224710119
91068797961
104037126346
1112886585236
1236161763120
1391629683271
14213681907449
15465104644470
16955060713621
171865654931141
183490074060228
196286011239592
2010948910130774
2118510503248611
2230469179410667

[0,0,0,378,90027,2931831,33720354,224710119,
 1068797961,4037126346,12886585236,36161763120,
 91629683271,213681907449,465104644470,
 955060713621,1865654931141,3490074060228,
 6286011239592,10948910130774,18510503248611,
 30469179410667]