A025746 - OEIS

A025746 as a simple table

n	a(n)
1	1
2	3
3	6
4	10
5	15
6	21
7	28
8	36
9	45
10	55
11	67
12	80
13	94
14	109
15	125
16	142
17	160
18	179
19	199
20	221
21	244
22	268
23	293
24	319
25	346
26	374
27	403
28	433
29	465
30	498
31	532
32	567
33	603
34	640
35	678
36	717
37	757
38	798
39	841
40	885
41	930
42	976
43	1023
44	1071
45	1120
46	1170
47	1221
48	1274
49	1328
50	1383
51	1439
52	1496
53	1554
54	1613

[1,3,6,10,15,21,28,36,45,55,67,80,94,109,125,142, 160,179,199,221,244,268,293,319,346,374,403,433, 465,498,532,567,603,640,678,717,757,798,841,885, 930,976,1023,1071,1120,1170,1221,1274,1328,1383, 1439,1496,1554,1613]