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A077381 as a simple table

na(n)
12
23
35
45
57
68
78
811
911
1014
1114
1214
1317
1419
1518
1620
1722
1820
1924
2026
2128
2226
2328
2430
2531
2632
2733
2836
2934
3037
3140
3236
3343
3442
3544
3646
3747
3846
3949
4048
4148
4251
4350
4456
4555
4657
4758
4860
4963
5059
5163
5263
5363
5469
5570
5667
5771
5871
5973
6071
6174
6278
6376
6478
6581
6679
6784
6883
6987
7085
7184
7287

[2,3,5,5,7,8,8,11,11,14,14,14,17,19,18,20,22,20,
 24,26,28,26,28,30,31,32,33,36,34,37,40,36,43,42,
 44,46,47,46,49,48,48,51,50,56,55,57,58,60,63,59,
 63,63,63,69,70,67,71,71,73,71,74,78,76,78,81,79,
 84,83,87,85,84,87]