A073818 - OEIS

A073818 as a simple table

n	a(n)
1	2
2	4
3	6
4	10
5	15
6	22
7	33
8	44
9	55
10	68
11	85
12	102
13	119
14	145
15	174
16	203
17	232
18	261
19	296
20	333
21	370
22	410
23	451
24	492
25	533
26	590
27	649
28	708
29	767
30	826
31	885
32	944
33	1005
34	1072
35	1139
36	1207
37	1278
38	1358
39	1455
40	1552
41	1649
42	1746
43	1843
44	1940
45	2037
46	2134
47	2231
48	2328
49	2425
50	2540
51	2667

[2,4,6,10,15,22,33,44,55,68,85,102,119,145,174, 203,232,261,296,333,370,410,451,492,533,590,649, 708,767,826,885,944,1005,1072,1139,1207,1278,1358, 1455,1552,1649,1746,1843,1940,2037,2134,2231,2328, 2425,2540,2667]