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A045513 as a simple table

na(n)
01
11
23
35
410
515
627
739
863
990
10135
11187
12270
13364
14505
15670
16902
171173
181545
191976
202550
213218
224081
235083
246357
257825
269659
2711772
2814366
2917342
3020956
3125080
3230031
3335667
3442357
3549945
3658881

[1,1,3,5,10,15,27,39,63,90,135,187,270,364,505,
 670,902,1173,1545,1976,2550,3218,4081,5083,6357,
 7825,9659,11772,14366,17342,20956,25080,30031,
 35667,42357,49945,58881]