A025743 - OEIS

A025743 as a simple table

n	a(n)
1	1
2	3
3	6
4	11
5	17
6	25
7	34
8	45
9	57
10	70
11	85
12	101
13	119
14	138
15	159
16	181
17	204
18	229
19	255
20	283
21	312
22	343
23	375
24	408
25	443
26	479
27	517
28	556
29	597
30	639
31	682
32	727
33	773
34	821
35	870
36	921
37	973
38	1026
39	1081
40	1137
41	1195
42	1254
43	1315
44	1377
45	1440
46	1505
47	1571
48	1639
49	1708
50	1779
51	1851
52	1924

[1,3,6,11,17,25,34,45,57,70,85,101,119,138,159, 181,204,229,255,283,312,343,375,408,443,479,517, 556,597,639,682,727,773,821,870,921,973,1026,1081, 1137,1195,1254,1315,1377,1440,1505,1571,1639,1708, 1779,1851,1924]