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A147403 as a simple table

na(n)
11
21
31
41
51
61
71
81
99
1025
1137
1281
13207
14659
151525
165011
1716955
1878955
19307577
201539617
216559267
2239653567
23197073411
241351045655

[1,1,1,1,1,1,1,1,9,25,37,81,207,659,1525,5011,
 16955,78955,307577,1539617,6559267,39653567,
 197073411,1351045655]