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A147439 as a simple table

na(n)
11
21
31
41
51
63
79
819
946
10175
11744
123837
1322276
14149923
151180818
1611235559

[1,1,1,1,1,3,9,19,46,175,744,3837,22276,149923,
 1180818,11235559]