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A045599号作为一个简单的表

n个a(n)
11
2
5
49
515
625
727
845
955
1075
1181
12125
13135
14165
15171
16225
17243
18275
19375
20405
21495
22513
23605
24625
25675
26729
27825
28855
291125
301215
311375
321485
331539
341815
351875
362025
372187
382475
392565
403025
413125
423249
433375
443645
454125
464275
474455
484617
494965
505445

[1,3,5,9,15,25,27,45,55,75,81,125,135,165,171,225,243,275,375,405,495,513,605,625,675,729,825,855,1125,1215,1375,1485,1539,1815,1875,2025,2187,2475,2565,3025,3125,3249,3375,3645,4125,4275,4455,4617,4965,5445]