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A131923 as a simple table

na(n)
01
12
22
33
44
53
64
76
86
94
105
118
1210
138
145
156
1610
1715
1815
1910
206
217
2212
2321
2426
2521
2612
277
288
2914
3028
3142
3242
3328
3414
358
369
3716
3836
3964
4078
4164
4236
4316
449
4510
4618
4745
4893
49135
50135
5193
5245
5318
5410
5511
5620
5755
58130
59220
60262
61220
62130
6355
6420
6511
6612
6722
6866

[1,2,2,3,4,3,4,6,6,4,5,8,10,8,5,6,10,15,15,10,6,7,
 12,21,26,21,12,7,8,14,28,42,42,28,14,8,9,16,36,64,
 78,64,36,16,9,10,18,45,93,135,135,93,45,18,10,11,
 20,55,130,220,262,220,130,55,20,11,12,22,66]