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A173540 as a simple table

na(n)
10
20
32
43
52
63
74
84
95
102
113
124
135
146
153
165
176
187
192
204
215
226
237
248
253
264
276
287
298
309
312
323
334
345
356
367
378
389
3910
405
417
428
439
4410
4511
462
473
484
495
506
517
528
539
5410
5511
5612
573
584
595
606
618
629
6310
6411
6512
6613
672
684
696
707
718
729
7310
7411
7512
7613
7714
783
795
806
817
829
8310
8411
8512
8613
8714
8815
892
903
914
925
936
947

[0,0,2,3,2,3,4,4,5,2,3,4,5,6,3,5,6,7,2,4,5,6,7,8,
 3,4,6,7,8,9,2,3,4,5,6,7,8,9,10,5,7,8,9,10,11,2,3,
 4,5,6,7,8,9,10,11,12,3,4,5,6,8,9,10,11,12,13,2,4,
 6,7,8,9,10,11,12,13,14,3,5,6,7,9,10,11,12,13,14,
 15,2,3,4,5,6,7]