A084265 - OEIS

A084265 as a simple table

n	a(n)
0	1
1	2
2	6
3	9
4	15
5	20
6	28
7	35
8	45
9	54
10	66
11	77
12	91
13	104
14	120
15	135
16	153
17	170
18	190
19	209
20	231
21	252
22	276
23	299
24	325
25	350
26	378
27	405
28	435
29	464
30	496
31	527
32	561
33	594
34	630
35	665
36	703
37	740
38	780
39	819
40	861
41	902
42	946
43	989
44	1035
45	1080
46	1128
47	1175
48	1225
49	1274
50	1326
51	1377
52	1431
53	1484

[1,2,6,9,15,20,28,35,45,54,66,77,91,104,120,135, 153,170,190,209,231,252,276,299,325,350,378,405, 435,464,496,527,561,594,630,665,703,740,780,819, 861,902,946,989,1035,1080,1128,1175,1225,1274, 1326,1377,1431,1484]