A389320 - OEIS

A389320 as a simple table

n	a(n)
0	0
1	0
2	1
3	3
4	5
5	8
6	12
7	16
8	21
9	27
10	34
11	42
12	50
13	59
14	69
15	79
16	90
17	102
18	115
19	129
20	143
21	158
22	174
23	190
24	207
25	225
26	244
27	264
28	284
29	305
30	327
31	349
32	372
33	396
34	421
35	447
36	473
37	500
38	528
39	556
40	585
41	615
42	646
43	678
44	710
45	743
46	777
47	811
48	846
49	882
50	919
51	957
52	995
53	1034
54	1074
55	1114

[0,0,1,3,5,8,12,16,21,27,34,42,50,59,69,79,90,102, 115,129,143,158,174,190,207,225,244,264,284,305, 327,349,372,396,421,447,473,500,528,556,585,615, 646,678,710,743,777,811,846,882,919,957,995,1034, 1074,1114]