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A252921 as a simple table

na(n)
1258746
23590945
354457598
4899378367
516084394412
6280079543014
74917133211603
888400589505093
91559068278259511
1027650186219325071
11494188223889426223
128760232221387520144
13155647635491709722213

[258746,3590945,54457598,899378367,16084394412,
 280079543014,4917133211603,88400589505093,
 1559068278259511,27650186219325071,
 494188223889426223,8760232221387520144,
 155647635491709722213]