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A153785 as a simple table

na(n)
00
15
235
390
4170
5275
6405
7560
8740
9945
101175
111430
121710
132015
142345
152700
163080
173485
183915
194370
204850
215355
225885
236440
247020
257625
268255
278910
289590
2910295
3011025
3111780
3212560
3313365
3414195
3515050
3615930
3716835
3817765

[0,5,35,90,170,275,405,560,740,945,1175,1430,1710,
 2015,2345,2700,3080,3485,3915,4370,4850,5355,5885,
 6440,7020,7625,8255,8910,9590,10295,11025,11780,
 12560,13365,14195,15050,15930,16835,17765]