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A280995 as a simple table

na(n)
00
11
23
31
43
57
65
71
83
911
1015
117
125
1313
149
151
163
1719
1827
1911
2015
2131
2223
237
245
2521
2629
2713
289
2925
3017
311
323
3335
3451
3519
3627
3759
3843
3911
4015
4147
4263
4331
4423
4555
4639
477
485
4937
5053
5121
5229
5361
5445
5513
569
5741
5857
5925
6017
6149
6233
631
643
6567
6699
6735
6851
69115
7083
7119
7227
7391
74123
7559
7643

[0,1,3,1,3,7,5,1,3,11,15,7,5,13,9,1,3,19,27,11,15,
 31,23,7,5,21,29,13,9,25,17,1,3,35,51,19,27,59,43,
 11,15,47,63,31,23,55,39,7,5,37,53,21,29,61,45,13,
 9,41,57,25,17,49,33,1,3,67,99,35,51,115,83,19,27,
 91,123,59,43]