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A113520 as a simple table

na(n)
10
21
31
41
54
61
76
81
98
109
1110
121
1312
149
1514
1615
1716
181
1918
209
2120
2221
2322
241
2524
2625
2726
2827
2928
301
3130
3227
3332
3433
3534
3635
3736
3835
3938
4039
4140
4225
4342
4439
4544
4645
4746
4835
4948
5049
5150
5251
5352
5449
5554
5655
5756
5857
5958
6049
6160
6257
6362
6463
6564
6665
6766
6865
6968
7069
7170
7265
7372
7469
7574

[0,1,1,1,4,1,6,1,8,9,10,1,12,9,14,15,16,1,18,9,20,
 21,22,1,24,25,26,27,28,1,30,27,32,33,34,35,36,35,
 38,39,40,25,42,39,44,45,46,35,48,49,50,51,52,49,
 54,55,56,57,58,49,60,57,62,63,64,65,66,65,68,69,
 70,65,72,69,74]