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A013648 as a simple table

na(n)
13
28
315
424
535
648
763
880
999
10120
11143
12168
13175
14176
15195
16208
17224
18255
19288
20323
21360
22399
23440
24483
25528
26551
27575
28624
29675
30728
31783
32799
33840
34899
35960
361023
371035
381088
391155
401224
411247
421295
431368
441403
451443
461520
471599
481680
491763
501848
511872

[3,8,15,24,35,48,63,80,99,120,143,168,175,176,195,
 208,224,255,288,323,360,399,440,483,528,551,575,
 624,675,728,783,799,840,899,960,1023,1035,1088,
 1155,1224,1247,1295,1368,1403,1443,1520,1599,1680,
 1763,1848,1872]