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A087978 as a simple table

na(n)
12310
2254540
31042404
421871365
5129963314
6830692265
74617927894
818297409143
941268813542
10287980277114
111182325618032
126455097761454

[2310,254540,1042404,21871365,129963314,830692265,
 4617927894,18297409143,41268813542,287980277114,
 1182325618032,6455097761454]