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A331804 as a simple table

na(n)
00
11
21
33
41
55
63
77
81
99
105
115
123
135
147
1515
161
1717
189
199
205
2121
226
237
243
259
265
2727
287
297
3015
3131
321
3333
3417
3517
369
379
389
399
405
419
4221
4321
446
4545
4614
4715
483
4917
509
5151
525
5321
5427
5527
567
579
587
5927
6015
6115
6231
6363
641
6565
6633
6733
6817
6917
7017
7117
729
7373
7410
759

[0,1,1,3,1,5,3,7,1,9,5,5,3,5,7,15,1,17,9,9,5,21,6,
 7,3,9,5,27,7,7,15,31,1,33,17,17,9,9,9,9,5,9,21,21,
 6,45,14,15,3,17,9,51,5,21,27,27,7,9,7,27,15,15,31,
 63,1,65,33,33,17,17,17,17,9,73,10,9]