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A274978 as a simple table

na(n)
10
21
313
416
540
645
781
888
9136
10145
11205
12216
13288
14301
15385
16400
17496
18513
19621
20640
21760
22781
23913
24936
251080
261105
271261
281288
291456
301485
311665
321696
331888
341921
352125
362160
372376
382413
392641
402680
412920
422961
433213
443256
453520
463565
473841
483888
494176
504225
514525
524576

[0,1,13,16,40,45,81,88,136,145,205,216,288,301,
 385,400,496,513,621,640,760,781,913,936,1080,1105,
 1261,1288,1456,1485,1665,1696,1888,1921,2125,2160,
 2376,2413,2641,2680,2920,2961,3213,3256,3520,3565,
 3841,3888,4176,4225,4525,4576]