A028872 - OEIS

A028872 as a simple table

n	a(n)
2	1
3	6
4	13
5	22
6	33
7	46
8	61
9	78
10	97
11	118
12	141
13	166
14	193
15	222
16	253
17	286
18	321
19	358
20	397
21	438
22	481
23	526
24	573
25	622
26	673
27	726
28	781
29	838
30	897
31	958
32	1021
33	1086
34	1153
35	1222
36	1293
37	1366
38	1441
39	1518
40	1597
41	1678
42	1761
43	1846
44	1933
45	2022
46	2113
47	2206
48	2301

[1,6,13,22,33,46,61,78,97,118,141,166,193,222,253, 286,321,358,397,438,481,526,573,622,673,726,781, 838,897,958,1021,1086,1153,1222,1293,1366,1441, 1518,1597,1678,1761,1846,1933,2022,2113,2206,2301]