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A171890 as a simple table

na(n)
01
11
21
31
41
51
61
71
81
91
102
113
124
135
146
157
168
177
186
195
204
213
222
231
241
253
266
2710
2815
2921
3028
3136
3242
3346
3448
3548
3646
3742
3836
3928
4021
4115
4210
436
443
451
461
474
4810
4920
5035
5156
5284
53120
54161
55204
56246
57284
58315
59336
60344
61336
62315
63284
64246
65204
66161
67120
6884
6956
7035

[1,1,1,1,1,1,1,1,1,1,2,3,4,5,6,7,8,7,6,5,4,3,2,1,
 1,3,6,10,15,21,28,36,42,46,48,48,46,42,36,28,21,
 15,10,6,3,1,1,4,10,20,35,56,84,120,161,204,246,
 284,315,336,344,336,315,284,246,204,161,120,84,56,
 35]