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A131308 as a simple table

na(n)
00
12
22
32
41
54
64
74
82
96
106
116
123
138
148
158
164
1710
1810
1910
205
2112
2212
2312
246
2514
2614
2714
287
2916
3016
3116
328
3318
3418
3518
369
3720
3820
3920
4010
4122
4222
4322
4411
4524
4624
4724
4812
4926
5026
5126
5213
5328
5428
5528
5614
5730
5830
5930
6015
6132
6232
6332
6416
6534
6634
6734
6817
6936
7036
7136
7218
7338
7438
7538
7619

[0,2,2,2,1,4,4,4,2,6,6,6,3,8,8,8,4,10,10,10,5,12,
 12,12,6,14,14,14,7,16,16,16,8,18,18,18,9,20,20,20,
 10,22,22,22,11,24,24,24,12,26,26,26,13,28,28,28,
 14,30,30,30,15,32,32,32,16,34,34,34,17,36,36,36,
 18,38,38,38,19]