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A146476 as a simple table

na(n)
11
21
31
45
59
621
767
8487
91541
1016797
1192947
121357947
1311628507
14269865307
153412847085
16120253566545

[1,1,1,5,9,21,67,487,1541,16797,92947,1357947,
 11628507,269865307,3412847085,120253566545]