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A087688 as a simple table

na(n)
11
22
33
43
53
66
73
85
93
106
113
129
133
146
159
165
173
186
193
209
219
226
233
2415
253
266
273
289
293
3018
313
325
339
346
359
369
373
386
399
4015
413
4218
433
449
459
466
473
4815
493
506
519
529
533
546
559
5615
579
586
593
6027
613
626
639
645
659
6618
673
689
699
7018

[1,2,3,3,3,6,3,5,3,6,3,9,3,6,9,5,3,6,3,9,9,6,3,15,
 3,6,3,9,3,18,3,5,9,6,9,9,3,6,9,15,3,18,3,9,9,6,3,
 15,3,6,9,9,3,6,9,15,9,6,3,27,3,6,9,5,9,18,3,9,9,
 18]