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A176504 as a simple table

na(n)
12
23
34
44
55
65
76
86
96
107
117
128
137
149
158
1610
178
189
198
2010
2111
2212
239
2411
2513
269
2714
2810
2915
3012
3110
3213
3316
3411
3517
3614
3712
3818
3911
4010
4119
4215
4316
4412
4520
4617
4721
4811
4913
5022
5114
5223
5318
5413
5524
5612
5719
5825
5920
6015
6112
6226
6321
6427
6514
6616
6728
6813
6922
7029
7117
7215
7330
7423
7513
7631

[2,3,4,4,5,5,6,6,6,7,7,8,7,9,8,10,8,9,8,10,11,12,
 9,11,13,9,14,10,15,12,10,13,16,11,17,14,12,18,11,
 10,19,15,16,12,20,17,21,11,13,22,14,23,18,13,24,
 12,19,25,20,15,12,26,21,27,14,16,28,13,22,29,17,
 15,30,23,13,31]