A005228 - OEIS

A005228 as a simple table

n	a(n)
1	1
2	3
3	7
4	12
5	18
6	26
7	35
8	45
9	56
10	69
11	83
12	98
13	114
14	131
15	150
16	170
17	191
18	213
19	236
20	260
21	285
22	312
23	340
24	369
25	399
26	430
27	462
28	495
29	529
30	565
31	602
32	640
33	679
34	719
35	760
36	802
37	845
38	889
39	935
40	982
41	1030
42	1079
43	1129
44	1180
45	1232
46	1285
47	1339
48	1394
49	1451
50	1509
51	1568
52	1628
53	1689

[1,3,7,12,18,26,35,45,56,69,83,98,114,131,150,170, 191,213,236,260,285,312,340,369,399,430,462,495, 529,565,602,640,679,719,760,802,845,889,935,982, 1030,1079,1129,1180,1232,1285,1339,1394,1451,1509, 1568,1628,1689]