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A277633 as a simple table

na(n)
01
12
21
32
43
56
69
718
830
956
1098
11180
12311
13546
14915
151520
162440
173855
185916
198935
2013178
2119138
2227264
2338303
2452950
2572311
2697419
27129839
28171066
29223260
30288498
31369708
32469708
33592363
34741433
35921933
361138761
371398343
381706956
392072696
402503513
413009482
423600515
434289032
445087253
456010305
467073122
478293962

[1,2,1,2,3,6,9,18,30,56,98,180,311,546,915,1520,
 2440,3855,5916,8935,13178,19138,27264,38303,52950,
 72311,97419,129839,171066,223260,288498,369708,
 469708,592363,741433,921933,1138761,1398343,
 1706956,2072696,2503513,3009482,3600515,4289032,
 5087253,6010305,7073122,8293962]