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A028895 as a simple table

na(n)
00
15
215
330
450
575
6105
7140
8180
9225
10275
11330
12390
13455
14525
15600
16680
17765
18855
19950
201050
211155
221265
231380
241500
251625
261755
271890
282030
292175
302325
312480
322640
332805
342975
353150
363330
373515
383705
393900
404100
414305
424515
434730
444950
455175
465405
475640

[0,5,15,30,50,75,105,140,180,225,275,330,390,455,
 525,600,680,765,855,950,1050,1155,1265,1380,1500,
 1625,1755,1890,2030,2175,2325,2480,2640,2805,2975,
 3150,3330,3515,3705,3900,4100,4305,4515,4730,4950,
 5175,5405,5640]