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A109643 as a simple table

na(n)
11
21
3121
4123676641
5123679391831145033529042881
6123679391831147784436668492828330058796889905783980717429924756854206515936780161

[1,1,121,123676641,123679391831145033529042881,
 12367939183114778443666849282833005879688990578398\
 0717429924756854206515936780161]