A009859 - OEIS

A009859 as a simple table

n	a(n)
0	1
1	3
2	7
3	15
4	29
5	47
6	63
7	83
8	114
9	146
10	176
11	216
12	257
13	300
14	355
15	396
16	443
17	516
18	579
19	646
20	716
21	770
22	846
23	945
24	1029
25	1105
26	1199
27	1289
28	1385
29	1507
30	1595
31	1682
32	1816
33	1937
34	2056
35	2184
36	2289
37	2408
38	2563
39	2704
40	2825
41	2977
42	3129
43	3279
44	3454
45	3584
46	3720
47	3911

[1,3,7,15,29,47,63,83,114,146,176,216,257,300,355, 396,443,516,579,646,716,770,846,945,1029,1105, 1199,1289,1385,1507,1595,1682,1816,1937,2056,2184, 2289,2408,2563,2704,2825,2977,3129,3279,3454,3584, 3720,3911]