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A054602 as a simple table

na(n)
00
13
212
333
472
5135
6228
7357
8528
9747
101020
111353
121752
132223
142772
153405
164128
174947
185868
196897
208040
219303
2210692
2312213
2413872
2515675
2617628
2719737
2822008
2924447
3027060
3129853
3232832
3336003
3439372
3542945
3646728
3750727
3854948

[0,3,12,33,72,135,228,357,528,747,1020,1353,1752,
 2223,2772,3405,4128,4947,5868,6897,8040,9303,
 10692,12213,13872,15675,17628,19737,22008,24447,
 27060,29853,32832,36003,39372,42945,46728,50727,
 54948]