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A251391 as a simple table

na(n)
11
22
33
47
58
69
710
813
915
1016
1117
1220
1321
1422
1523
1624
1725
1828
1930
2032
2134
2235
2336
2438
2539
2641
2743
2844
2945
3047
3149
3251
3353
3456
3559
3660
3761
3862
3963
4064
4168
4270
4372
4473
4574
4677
4778
4879
4980
5081
5185
5286
5387
5488
5589
5690
5795
5896
5998
6099
61100
62101
63103
64105
65109

[1,2,3,7,8,9,10,13,15,16,17,20,21,22,23,24,25,28,
 30,32,34,35,36,38,39,41,43,44,45,47,49,51,53,56,
 59,60,61,62,63,64,68,70,72,73,74,77,78,79,80,81,
 85,86,87,88,89,90,95,96,98,99,100,101,103,105,109]