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A263728 as a simple table

na(n)
13
24
35
45
512
613
77
824
925
108
1115
1217
139
1440
1541
1611
1760
1861
1912
2035
2137
2213
2384
2485
2515
26112
27113
2816
2963
3065
3117
32144
33145
3419
35180
36181
3720
3821
3929
4020
4199
42101
4321
44220
45221
4623
47264
48265
4924
50143
51145
5225
53312
54313
5527
56364
57365
5828
5945
6053

[3,4,5,5,12,13,7,24,25,8,15,17,9,40,41,11,60,61,
 12,35,37,13,84,85,15,112,113,16,63,65,17,144,145,
 19,180,181,20,21,29,20,99,101,21,220,221,23,264,
 265,24,143,145,25,312,313,27,364,365,28,45,53]