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A031993号作为一个简单的表

n个a(n)
10
21
2
4
54
65
76
87
99
1010
1111
1212
1313
1414
1515
1618
1719
1820
1921
2022
2123
2227
2328
2429
2530
2631
2736
2837
2938
3039
3145
3246
3347
3454
3555
3663
3773
3874
3975
4076
4177
4278
4379
4482
4583
4684
4785
4886
4987
5091
5192
5293
5394
5495
55100
56101
57102
58103
59109
60110
61111
62118

[0,1,2,3,4,5,6,7,9,10,11,12,13,14,15,18,19,20,21,22,23,27,28,29,30,31,36,37,38,39,45,46,47,54,55,63,73,74,75,76,77,78,79,82,83,84,85,86,87,91,92,93,94,95,100,101,102,103,109,110,111,118]