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A033580 as a simple table

na(n)
00
18
228
360
4104
5160
6228
7308
8400
9504
10620
11748
12888
131040
141204
151380
161568
171768
181980
192204
202440
212688
222948
233220
243504
253800
264108
274428
284760
295104
305460
315828
326208
336600
347004
357420
367848
378288
388740
399204
409680
4110168
4210668
4311180
4411704
4512240

[0,8,28,60,104,160,228,308,400,504,620,748,888,
 1040,1204,1380,1568,1768,1980,2204,2440,2688,2948,
 3220,3504,3800,4108,4428,4760,5104,5460,5828,6208,
 6600,7004,7420,7848,8288,8740,9204,9680,10168,
 10668,11180,11704,12240]