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A147497 as a simple table

na(n)
11
21
31
49
525
657
7501
88327
9120657
101392679
1136251459
121768772831
13102759395829
146127996773779
15561420488133019

[1,1,1,9,25,57,501,8327,120657,1392679,36251459,
 1768772831,102759395829,6127996773779,
 561420488133019]