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A018834 as a simple table

na(n)
10
21
35
46
510
625
750
860
976
10100
11250
12376
13500
14600
15625
16760
171000
182500
193760
203792
215000
226000
236250
247600
259376
2610000
2714651
2825000
2937600
3050000
3160000
3262500
3376000
3490625
3593760
36100000
37109376
38250000
39376000
40495475
41500000
42505025

[0,1,5,6,10,25,50,60,76,100,250,376,500,600,625,
 760,1000,2500,3760,3792,5000,6000,6250,7600,9376,
 10000,14651,25000,37600,50000,60000,62500,76000,
 90625,93760,100000,109376,250000,376000,495475,
 500000,505025]