A258087 - OEIS

A258087 as a simple table

n	a(n)
0	0
1	0
2	1
3	3
4	6
5	9
6	14
7	18
8	25
9	30
10	39
11	45
12	56
13	63
14	76
15	84
16	99
17	108
18	125
19	135
20	154
21	165
22	186
23	198
24	221
25	234
26	259
27	273
28	300
29	315
30	344
31	360
32	391
33	408
34	441
35	459
36	494
37	513
38	550
39	570
40	609
41	630
42	671
43	693
44	736
45	759
46	804
47	828
48	875
49	900
50	949
51	975
52	1026
53	1053
54	1106
55	1134

[0,0,1,3,6,9,14,18,25,30,39,45,56,63,76,84,99,108, 125,135,154,165,186,198,221,234,259,273,300,315, 344,360,391,408,441,459,494,513,550,570,609,630, 671,693,736,759,804,828,875,900,949,975,1026,1053, 1106,1134]