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A147466 as a simple table

na(n)
11
21
31
41
51
69
721
863
9297
101127
115413
1231109
13218667
141954511
1518966855
16237663851
173316716099
1856055493989

[1,1,1,1,1,9,21,63,297,1127,5413,31109,218667,
 1954511,18966855,237663851,3316716099,56055493989]