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A101858 as a simple table

na(n)
12
25
35
47
513
67
710
818
918
1010
1113
1226
1325
1426
1513
1615
1734
1836
1936
2034
2115
2218
2339
2447
2552
2647
2739
2818
2920
3047
3154
3268
3368
3454
3547
3620
3723
3852
3965
4078
4189
4278
4365
4452
4523
4626
4760
4872
4994
50102
51102
5294
5372
5460
5526
5628
5768
5883
59104
60123
61117
62123
63104
6483
6568
6628
6731
6873
6994
70120

[2,5,5,7,13,7,10,18,18,10,13,26,25,26,13,15,34,36,
 36,34,15,18,39,47,52,47,39,18,20,47,54,68,68,54,
 47,20,23,52,65,78,89,78,65,52,23,26,60,72,94,102,
 102,94,72,60,26,28,68,83,104,123,117,123,104,83,
 68,28,31,73,94,120]