A122250 - OEIS

A122250 as a simple table

n	a(n)
0	0
1	1
2	3
3	7
4	12
5	18
6	26
7	35
8	45
9	58
10	72
11	87
12	104
13	122
14	141
15	162
16	184
17	207
18	233
19	260
20	288
21	318
22	349
23	381
24	415
25	450
26	486
27	526
28	567
29	609
30	653
31	698
32	744
33	792
34	841
35	891
36	944
37	998
38	1053
39	1110
40	1168

[0,1,3,7,12,18,26,35,45,58,72,87,104,122,141,162, 184,207,233,260,288,318,349,381,415,450,486,526, 567,609,653,698,744,792,841,891,944,998,1053,1110, 1168]