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A280739 as a simple table

na(n)
44
56
68
710
815
920
1021
1128
1235
1356
1470
15105
16140
17147
18196
19198
20220
21231
22260
23273
24364
25455
26459
27510
28513
29570
30676
31798
321064
331122
341242
351254
361288
371463
381976
392057
402277
412299
422320
432436
442480
452527
462552
472622
482728
492997
503224
513509
523885
534147
544216
554433
564592
574810
584816
595412
605661
615676
625875
636253

[4,6,8,10,15,20,21,28,35,56,70,105,140,147,196,
 198,220,231,260,273,364,455,459,510,513,570,676,
 798,1064,1122,1242,1254,1288,1463,1976,2057,2277,
 2299,2320,2436,2480,2527,2552,2622,2728,2997,3224,
 3509,3885,4147,4216,4433,4592,4810,4816,5412,5661,
 5676,5875,6253]