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A175213 as a simple table

na(n)
01
12
24
36
43
55
67
79
86
94
106
118
1210
137
149
1511
165
177
189
1911
208
2110
2212
2314
2411
256
268
2710
2812
299
3011
3113
3215
3312
3410
3512
367
379
3811
3913
4010
4112
4214
4316
4413
4511
4613
4715
4817
498
5010
5112
5214
5311
5413
5515
5617
5714
5812
5914
6016
6118
6215
6317
649
6511
6613
6715
6812
6914
7016
7118
7215
7313
7415
7517
7619
7716

[1,2,4,6,3,5,7,9,6,4,6,8,10,7,9,11,5,7,9,11,8,10,
 12,14,11,6,8,10,12,9,11,13,15,12,10,12,7,9,11,13,
 10,12,14,16,13,11,13,15,17,8,10,12,14,11,13,15,17,
 14,12,14,16,18,15,17,9,11,13,15,12,14,16,18,15,13,
 15,17,19,16]