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A138554 as a simple table

na(n)
00
11
22
33
42
53
64
75
84
93
104
115
126
135
146
157
164
175
186
197
206
217
228
239
248
255
266
277
288
297
308
319
328
339
348
359
366
377
388
399
408
419
4210
4311
4410
459
4610
4711
4812
497
508
519
5210
539
5410
5511
5612
5711
5810
5911
6012
6111
6212
6313
648
659
6610
6711
6810
6911
7012
7113
7212
7311
7412
7513
7614
7713
7814
7915
8012
819
8210
8311
8412
8511

[0,1,2,3,2,3,4,5,4,3,4,5,6,5,6,7,4,5,6,7,6,7,8,9,
 8,5,6,7,8,7,8,9,8,9,8,9,6,7,8,9,8,9,10,11,10,9,10,
 11,12,7,8,9,10,9,10,11,12,11,10,11,12,11,12,13,8,
 9,10,11,10,11,12,13,12,11,12,13,14,13,14,15,12,9,
 10,11,12,11]