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A252118 as a simple table

na(n)
141092
21091710
330699048
4845139814
523117206344
6633958684608
717408568411762
8477854088388692
913112744813104416
10359859098814488430
119876406203110032122
12271053452527870349598
137438853002317194594032

[41092,1091710,30699048,845139814,23117206344,
 633958684608,17408568411762,477854088388692,
 13112744813104416,359859098814488430,
 9876406203110032122,271053452527870349598,
 7438853002317194594032]