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A033586 as a simple table

na(n)
00
112
240
384
4144
5220
6312
7420
8544
9684
10840
111012
121200
131404
141624
151860
162112
172380
182664
192964
203280
213612
223960
234324
244704
255100
265512
275940
286384
296844
307320
317812
328320
338844
349384
359940
3610512
3711100
3811704
3912324
4012960
4113612
4214280

[0,12,40,84,144,220,312,420,544,684,840,1012,1200,
 1404,1624,1860,2112,2380,2664,2964,3280,3612,3960,
 4324,4704,5100,5512,5940,6384,6844,7320,7812,8320,
 8844,9384,9940,10512,11100,11704,12324,12960,
 13612,14280]