A081689 - OEIS

A081689 as a simple table

n	a(n)
0	0
1	2
2	6
3	11
4	17
5	25
6	34
7	44
8	55
9	68
10	82
11	97
12	113
13	130
14	149
15	169
16	190
17	212
18	235
19	259
20	284
21	311
22	339
23	368
24	398
25	429
26	461
27	494
28	528
29	564
30	601
31	639
32	678
33	718
34	759
35	801
36	844
37	888
38	934
39	981
40	1029
41	1078
42	1128
43	1179
44	1231
45	1284
46	1338
47	1393
48	1450
49	1508
50	1567
51	1627
52	1688

[0,2,6,11,17,25,34,44,55,68,82,97,113,130,149,169, 190,212,235,259,284,311,339,368,398,429,461,494, 528,564,601,639,678,718,759,801,844,888,934,981, 1029,1078,1128,1179,1231,1284,1338,1393,1450,1508, 1567,1627,1688]