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A218520 as a simple table

na(n)
1236
242812
37687526
41326731972
5232640291710
640522780697742
77051080210074740
81226141540661411646
9213181725321313805184
1037062512930409971808074
116443364732821356673971218

[236,42812,7687526,1326731972,232640291710,
 40522780697742,7051080210074740,
 1226141540661411646,213181725321313805184,
 37062512930409971808074,6443364732821356673971218]