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A308690 as a simple table

na(n)
11
21
33
41
53
64
71
83
94
107
111
123
134
149
156
161
173
184
1913
206
2112
221
233
244
2521
266
2724
288
291
303
314
3237
336
3466
358
3615
371
383
394
4069
416
42216
438
4441
4513
461
473
484
49133
506
51762
528
53201
5437
5518
561
573
584
59261
606
612784
628
631289
64253
6568
6612
671
683
694
70517
716
7210386
738
749225
752197
76648
7712
7828

[1,1,3,1,3,4,1,3,4,7,1,3,4,9,6,1,3,4,13,6,12,1,3,
 4,21,6,24,8,1,3,4,37,6,66,8,15,1,3,4,69,6,216,8,
 41,13,1,3,4,133,6,762,8,201,37,18,1,3,4,261,6,
 2784,8,1289,253,68,12,1,3,4,517,6,10386,8,9225,
 2197,648,12,28]