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A047491 as a simple table

na(n)
14
25
37
412
513
615
720
821
923
1028
1129
1231
1336
1437
1539
1644
1745
1847
1952
2053
2155
2260
2361
2463
2568
2669
2771
2876
2977
3079
3184
3285
3387
3492
3593
3695
37100
38101
39103
40108
41109
42111
43116
44117
45119
46124
47125
48127
49132
50133
51135
52140
53141
54143
55148
56149
57151
58156
59157

[4,5,7,12,13,15,20,21,23,28,29,31,36,37,39,44,45,
 47,52,53,55,60,61,63,68,69,71,76,77,79,84,85,87,
 92,93,95,100,101,103,108,109,111,116,117,119,124,
 125,127,132,133,135,140,141,143,148,149,151,156,
 157]