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A251857 as a simple table

na(n)
12525037
2216245728
320861600041
41840787119956
5164065118611251
614820877153549049
71334288403583213012
8120005649204594579167
910802330861739344082166
10972390283849153112134282

[2525037,216245728,20861600041,1840787119956,
 164065118611251,14820877153549049,
 1334288403583213012,120005649204594579167,
 10802330861739344082166,972390283849153112134282]