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A051661 as a simple table

na(n)
01
12
23
34
45
56
68
79
810
912
1015
1116
1218
1320
1423
1524
1625
1727
1830
1934
2035
2136
2237
2338
2439
2542
2652
2756
2867
2968
3077
3180
3286
3387
3499
35120
36137
37143
38150
39188

[1,2,3,4,5,6,8,9,10,12,15,16,18,20,23,24,25,27,30,
 34,35,36,37,38,39,42,52,56,67,68,77,80,86,87,99,
 120,137,143,150,188]