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A151710号作为一个简单的表

n个a(n)
11
2
49
5
69
79
821
9
109
119
1221
1315
1421
1527
1651
17
189
199
2021
2115
2221
2327
2451
2521
2621
2727
2851

[1,3,3,9,3,9,9,21,3,9,9,21,15,21,27,51,3,9,9,21,15,21,27,51,21,21,27,51]