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A281759 as a simple table

na(n)
01
13
23
315
43
57
611
731
835
939
10107
11255
12771
131799
142571
155151
1614371
1720519
1845163
1994463
20176899
21358151
22702987
231365023
242865187
256115367
2611202667
2724195327
2845511427
2999464967
30174062091
31346035231
32700479523
331384222759
342894311531
356426063103

[1,3,3,15,3,7,11,31,35,39,107,255,771,1799,2571,
 5151,14371,20519,45163,94463,176899,358151,702987,
 1365023,2865187,6115367,11202667,24195327,
 45511427,99464967,174062091,346035231,700479523,
 1384222759,2894311531,6426063103]