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A084878 as a simple table

na(n)
00
10
20
315
41729366
510340309701
624380294253318
736539301527565851
842407896071362952494
942091311943805278602897
1037781049596189171124466966
1131727275407315883994852626087

[0,0,0,15,1729366,10340309701,24380294253318,
 36539301527565851,42407896071362952494,
 42091311943805278602897,
 37781049596189171124466966,
 31727275407315883994852626087]