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A123609 as a simple table

na(n)
14
21
32
43
54
64
73
84
92
103
114
121
132
143
154
161
172
183
194
202
213
224
231
242
253
264
273
284
292
303
314
321
332
343
354
364
373
384
392
403
414
421
432
443
454

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