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A067338 as a simple table

na(n)
12
23
312
4138
511937
673102188
72672848933402062
83572060905817696883164853272313
96379809557435582128907282471156933713351634534272773703460187

[2,3,12,138,11937,73102188,2672848933402062,
 3572060905817696883164853272313,
 63798095574355821289072824711569337133516345342727\
 73703460187]