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A035515 as a simple table

na(n)
00
11
22
33
413
55
615
725
88
918
1028
1138
12138
1313
14113
15213
16313
171313
18513
191513
202513
2121
22121
23221
24321
251321
26521
271521
282521
29821
301821
312821
323821
3313821
3434
35134
36234
37334
381334
39534
401534
412534
42834
431834
442834
453834
4613834
471334
4811334
4921334

[0,1,2,3,13,5,15,25,8,18,28,38,138,13,113,213,313,
 1313,513,1513,2513,21,121,221,321,1321,521,1521,
 2521,821,1821,2821,3821,13821,34,134,234,334,1334,
 534,1534,2534,834,1834,2834,3834,13834,1334,11334,
 21334]