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A187786 as a simple table

na(n)
00
11
22
33
44
55
66
75
86
97
108
119
1210
1312
149
1510
1612
1711
1813
1914
209
2110
2212
2311
2413
2514
2611
2713
2814
2915
3016
3117
3218
3320
3424
3517
3618
3720
3824
3919
4021
4122
4225
4326
4428
4517
4618
4720
4824
4919
5021
5122
5225
5326
5428
5519
5621
5722
5825
5926
6028
6123
6227
6329
6430
6517
6618
6720

[0,1,2,3,4,5,6,5,6,7,8,9,10,12,9,10,12,11,13,14,9,
 10,12,11,13,14,11,13,14,15,16,17,18,20,24,17,18,
 20,24,19,21,22,25,26,28,17,18,20,24,19,21,22,25,
 26,28,19,21,22,25,26,28,23,27,29,30,17,18,20]