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A118955 as a simple table

na(n)
13
24
35
46
57
68
79
810
911
1012
1113
1214
1315
1417
1518
1619
1720
1821
1923
2024
2125
2227
2329
2430
2531
2632
2733
2834
2935
3037
3138
3239
3341
3442
3543
3644
3745
3847
3948
4049
4151
4253
4354
4455
4557
4659
4760
4861
4962
5063
5165
5266
5367
5468
5569
5671
5772
5873
5974
6075
6177
6279
6380
6481
6583
6684
6785
6887
6989
7090
7191
7293

[3,4,5,6,7,8,9,10,11,12,13,14,15,17,18,19,20,21,
 23,24,25,27,29,30,31,32,33,34,35,37,38,39,41,42,
 43,44,45,47,48,49,51,53,54,55,57,59,60,61,62,63,
 65,66,67,68,69,71,72,73,74,75,77,79,80,81,83,84,
 85,87,89,90,91,93]