A075320 - OEIS

A075320 as a simple table

n	a(n)
1	3
2	45
3	91
4	209
5	375
6	493
7	735
8	897
9	1215
10	1581
11	1815
12	2257
13	2747
14	3053
15	3619
16	3969
17	4611
18	5301
19	5723
20	6489
21	6955
22	7797
23	8687
24	9225
25	10191
26	11205
27	11815
28	12905
29	13559
30	14725
31	15939
32	16665
33	17955
34	19293
35	20091
36	21505
37	22347
38	23837
39	25375
40	26289

[3,45,91,209,375,493,735,897,1215,1581,1815,2257, 2747,3053,3619,3969,4611,5301,5723,6489,6955,7797, 8687,9225,10191,11205,11815,12905,13559,14725, 15939,16665,17955,19293,20091,21505,22347,23837, 25375,26289]