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A003451 as a simple table

na(n)
51
64
78
816
925
1040
1156
1280
13105
14140
15176
16224
17273
18336
19400
20480
21561
22660
23760
24880
251001
261144
271288
281456
291625
301820
312016
322240
332465
342720
352976
363264
373553
383876
394200
404560
414921
425320
435720
446160
456601
467084
477568
488096
498625
509200
519776
5210400

[1,4,8,16,25,40,56,80,105,140,176,224,273,336,400,
 480,561,660,760,880,1001,1144,1288,1456,1625,1820,
 2016,2240,2465,2720,2976,3264,3553,3876,4200,4560,
 4921,5320,5720,6160,6601,7084,7568,8096,8625,9200,
 9776,10400]