A026104 - OEIS

A026104 as a simple table

n	a(n)
1	1
2	3
3	6
4	10
5	15
6	24
7	33
8	44
9	55
10	69
11	92
12	115
13	138
14	161
15	186
16	217
17	248
18	287
19	328
20	369
21	410
22	451
23	492
24	533
25	590
26	649
27	708
28	767
29	826
30	885
31	944
32	1003
33	1068
34	1157
35	1246
36	1335
37	1424
38	1515
39	1616
40	1717
41	1818
42	1919
43	2020
44	2121
45	2222
46	2323
47	2424
48	2540
49	2667
50	2794
51	2921

[1,3,6,10,15,24,33,44,55,69,92,115,138,161,186, 217,248,287,328,369,410,451,492,533,590,649,708, 767,826,885,944,1003,1068,1157,1246,1335,1424, 1515,1616,1717,1818,1919,2020,2121,2222,2323,2424, 2540,2667,2794,2921]