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A333649 as a simple table

na(n)
13
27
341
493
5166
6316
71449
86605
910015
1013097
1116284
1219075
1335137
1470558
15128436

[3,7,41,93,166,316,1449,6605,10015,13097,16284,
 19075,35137,70558,128436]