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2016年2月23日作为一个简单的表

n个a(n)
01
15
214
42
467
5151
6200
7340
8429
9689
10802
111182
121343
131875
142108
152728
163073
173941
184310
195426
205843
217239
227728
239340
249949
2511905
2612586
2714822
2815647
2918195
3019236
3121840
3223209
3326317
3427710
3531322
3632763
3736911
3838424
3943044
4044677
4149897
4251602

[1,5,14,42,67,151,200,340,429,689,802,1182,1343,1875,2108,2728,3073,3941,4310,5426,5843,7239,7728,9340,9949,11905,12586,14822,15647,18195,19236,21840,23209,26317,27710,31322,32763,36911,38424,43044,44677,49897,51602]