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A368046 as a simple table

na(n)
00
13
221
376
4200
5435
6833
71456
82376
93675
105445
117788
1210816
1314651
1419425
1525280
1632368
1740851
1850901
1962700
2076440
2192323
22110561
23131376
24155000
25181675
26211653
27245196
28282576
29324075
30369985
31420608
32476256
33537251

[0,3,21,76,200,435,833,1456,2376,3675,5445,7788,
 10816,14651,19425,25280,32368,40851,50901,62700,
 76440,92323,110561,131376,155000,181675,211653,
 245196,282576,324075,369985,420608,476256,537251]