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A173964 as a simple table

na(n)
11
22
31
42
53
62
73
81
92
103
114
123
134
142
153
164
171
182
193
204
215
224
235
243
254
265
272
283
294
305
311
322
333
344
355
366
375
386
394
405
416
423
434
445
456
462
473
484
495
506
511
522
533
544
555
566
577
586
597
605
616
627
634
645
656
667
673
684
695
706
717
722
733
744
755
766
777
781
792
803
814
825
836
847
858

[1,2,1,2,3,2,3,1,2,3,4,3,4,2,3,4,1,2,3,4,5,4,5,3,
 4,5,2,3,4,5,1,2,3,4,5,6,5,6,4,5,6,3,4,5,6,2,3,4,5,
 6,1,2,3,4,5,6,7,6,7,5,6,7,4,5,6,7,3,4,5,6,7,2,3,4,
 5,6,7,1,2,3,4,5,6,7,8]