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A242455 as a simple table

na(n)
12
23
34
45
56
67
78
810
911
1012
1113
1215
1316
1417
1519
1620
1723
1824
1925
2029
2130
2231
2332
2435
2537
2640
2741
2843
2947
3048
3150
3253
3355
3459
3560
3661
3764
3867
3971
4073
4175
4277
4379
4480
4583
4689
4796
4897
49100
50101
51103
52107
53109
54113
55120
56121
57125
58127
59128
60131
61137
62139
63143

[2,3,4,5,6,7,8,10,11,12,13,15,16,17,19,20,23,24,
 25,29,30,31,32,35,37,40,41,43,47,48,50,53,55,59,
 60,61,64,67,71,73,75,77,79,80,83,89,96,97,100,101,
 103,107,109,113,120,121,125,127,128,131,137,139,
 143]