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A161332 as a simple table

na(n)
00
11
23
33
43
59
63
79
89
99
1015
119
1215
1321
143
159
169
1715
1827
1915
2039
2121
2227
2339
2421
2533
2639
279
2821
2921
3027
3145
3233
3363
3445
3545
3651
3733
3839
3945
4045
4145
4227
4333
4457
4539
4663
4763
4851
4951
5069
5151
5281
5351
5457
5581
5663
5781
5857
5951
6051
6163
6293
6393
6475
6569
6663

[0,1,3,3,3,9,3,9,9,9,15,9,15,21,3,9,9,15,27,15,39,
 21,27,39,21,33,39,9,21,21,27,45,33,63,45,45,51,33,
 39,45,45,45,27,33,57,39,63,63,51,51,69,51,81,51,
 57,81,63,81,57,51,51,63,93,93,75,69,63]