A051942 - OEIS

A051942 as a simple table

n	a(n)
9	0
10	10
11	21
12	33
13	46
14	60
15	75
16	91
17	108
18	126
19	145
20	165
21	186
22	208
23	231
24	255
25	280
26	306
27	333
28	361
29	390
30	420
31	451
32	483
33	516
34	550
35	585
36	621
37	658
38	696
39	735
40	775
41	816
42	858
43	901
44	945
45	990
46	1036
47	1083
48	1131
49	1180
50	1230
51	1281
52	1333
53	1386
54	1440
55	1495
56	1551
57	1608
58	1666

[0,10,21,33,46,60,75,91,108,126,145,165,186,208, 231,255,280,306,333,361,390,420,451,483,516,550, 585,621,658,696,735,775,816,858,901,945,990,1036, 1083,1131,1180,1230,1281,1333,1386,1440,1495,1551, 1608,1666]