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A115661 as a simple table

na(n)
11
22
33
44
55
66
77
88
99
1011
1112
1213
1315
1416
1517
1621
1722
1823
1926
2028
2131
2232
2333
2436
2537
2639
2744
2845
2951
3054
3155
3256
3357
3458
3561
3662
3763
3865
3966
4068
4169
4271
4373
4475
4577
4679
4782
4885
4986
5088
5193
5296
5397
5499
55101
56107
57108
58111
59113
60115
61116
62117
63121
64122
65123
66125
67128

[1,2,3,4,5,6,7,8,9,11,12,13,15,16,17,21,22,23,26,
 28,31,32,33,36,37,39,44,45,51,54,55,56,57,58,61,
 62,63,65,66,68,69,71,73,75,77,79,82,85,86,88,93,
 96,97,99,101,107,108,111,113,115,116,117,121,122,
 123,125,128]