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A287917 as a simple table

na(n)
21
31
42
51
61
71
81
92
101
112
123
131
142
151
163
171
182
192
204
211
223
231
243
251
262
274
281
292
303
314
322
331
343
351
362
373
385
394
401
413
425
432
441
454
461
476
484
492
503
511
522
535
541
554
563
572
586
591
603
615
622
634
642
655
661
676
683
691
706
711
722
733
744
755
767
773
781
794
802
811
826
831
843
852
867
875
884

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