A211441 - OEIS

A211441 as a simple table

n	a(n)
0	0
1	3
2	15
3	33
4	57
5	87
6	123
7	165
8	213
9	267
10	327
11	393
12	465
13	543
14	627
15	717
16	813
17	915
18	1023
19	1137
20	1257
21	1383
22	1515
23	1653
24	1797
25	1947
26	2103
27	2265
28	2433
29	2607
30	2787
31	2973
32	3165
33	3363
34	3567
35	3777
36	3993
37	4215
38	4443
39	4677
40	4917
41	5163
42	5415
43	5673
44	5937

[0,3,15,33,57,87,123,165,213,267,327,393,465,543, 627,717,813,915,1023,1137,1257,1383,1515,1653, 1797,1947,2103,2265,2433,2607,2787,2973,3165,3363, 3567,3777,3993,4215,4443,4677,4917,5163,5415,5673, 5937]