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A091831 as a simple table

na(n)
01
13
28
333
435
539201
639203
760245508192801
860245508192803
9218662352649181293830957829984632156775201
10218662352649181293830957829984632156775203

[1,3,8,33,35,39201,39203,60245508192801,
 60245508192803,
 218662352649181293830957829984632156775201,
 218662352649181293830957829984632156775203]