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A214718 as a simple table

na(n)
12
21
32
42
54
61
72
81
92
102
114
121
132
141
152
163
174
181
192
201
212
222
234
241
252
261
272
282
294
301
312
321
332
342
354
362
372
381
392
402
414
421
434
441
452
462
474
481
492
501
512
522
534
541
552
561
572
583
594
601
612
621
632
642
654
661
672
681
692
703
714
721
732
741
752
762
774
782
792
801
812
822
834
841
852
861
872

[2,1,2,2,4,1,2,1,2,2,4,1,2,1,2,3,4,1,2,1,2,2,4,1,
 2,1,2,2,4,1,2,1,2,2,4,2,2,1,2,2,4,1,4,1,2,2,4,1,2,
 1,2,2,4,1,2,1,2,3,4,1,2,1,2,2,4,1,2,1,2,3,4,1,2,1,
 2,2,4,2,2,1,2,2,4,1,2,1,2]