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A051601 as a simple table

na(n)
00
11
21
32
42
52
63
74
84
93
104
117
128
137
144
155
1611
1715
1815
1911
205
216
2216
2326
2430
2526
2616
276
287
2922
3042
3156
3256
3342
3422
357
368
3729
3864
3998
40112
4198
4264
4329
448
459
4637
4793
48162
49210
50210
51162
5293
5337
549
5510
5646
57130
58255
59372
60420
61372
62255
63130
6446
6510

[0,1,1,2,2,2,3,4,4,3,4,7,8,7,4,5,11,15,15,11,5,6,
 16,26,30,26,16,6,7,22,42,56,56,42,22,7,8,29,64,98,
 112,98,64,29,8,9,37,93,162,210,210,162,93,37,9,10,
 46,130,255,372,420,372,255,130,46,10]