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A068254 as a simple table

na(n)
11
221
32403
41500183
55110723191
695013316876491
79639473169171326643
85336900216006709884938623
916124704040675904181778734982451
10265865038636937159336134567410478299051

[1,21,2403,1500183,5110723191,95013316876491,
 9639473169171326643,5336900216006709884938623,
 16124704040675904181778734982451,
 265865038636937159336134567410478299051]