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A098901 as a simple table

na(n)
11
22
33
44
55
67
78
89
910
1011
1113
1214
1315
1416
1517
1619
1722
1823
1925
2026
2129
2231
2332
2433
2534
2635

[1,2,3,4,5,7,8,9,10,11,13,14,15,16,17,19,22,23,25,
 26,29,31,32,33,34,35]