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A087454 as a simple table

na(n)
21
32
43
52
66
710
89
95
104
1115
1226
1328
1421
1511
168
179
1830
1951
2017
2136
2261
2320
2414
2578
2673
2751
2826
2954
3082
31105
3232
3322
3469
3514
3675
37126
38131
3941
4028
4129
4290
43163
4496
45145
4699
4783
4888
4956
50114
51172
5239
53120
54217
5542
5643
5744
58135
59226
60208
61141
6285
6321
6477
65156
66235
6768
68276

[1,2,3,2,6,10,9,5,4,15,26,28,21,11,8,9,30,51,17,
 36,61,20,14,78,73,51,26,54,82,105,32,22,69,14,75,
 126,131,41,28,29,90,163,96,145,99,83,88,56,114,
 172,39,120,217,42,43,44,135,226,208,141,85,21,77,
 156,235,68,276]