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A072870 as a simple table

na(n)
16941
2283580
36769195
4113677620
51481094208
615885002990
7145842897285
81178181997670
98545476792825
1056509982606938
11344819851018601
121960225745409515
1310463156294045765
1452780423989098940

[6941,283580,6769195,113677620,1481094208,
 15885002990,145842897285,1178181997670,
 8545476792825,56509982606938,344819851018601,
 1960225745409515,10463156294045765,
 52780423989098940]