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A003090 as a simple table

na(n)
11
21
31
42
52
612
7147
8283657
919270853541
1034817397894749939
112036029552582883134196099

[1,1,1,2,2,12,147,283657,19270853541,
 34817397894749939,2036029552582883134196099]