A005581 - OEIS

A005581 as a simple table

n	a(n)
0	0
1	0
2	2
3	7
4	16
5	30
6	50
7	77
8	112
9	156
10	210
11	275
12	352
13	442
14	546
15	665
16	800
17	952
18	1122
19	1311
20	1520
21	1750
22	2002
23	2277
24	2576
25	2900
26	3250
27	3627
28	4032
29	4466
30	4930
31	5425
32	5952
33	6512
34	7106
35	7735
36	8400
37	9102
38	9842
39	10621
40	11440
41	12300
42	13202
43	14147
44	15136
45	16170

[0,0,2,7,16,30,50,77,112,156,210,275,352,442,546, 665,800,952,1122,1311,1520,1750,2002,2277,2576, 2900,3250,3627,4032,4466,4930,5425,5952,6512,7106, 7735,8400,9102,9842,10621,11440,12300,13202,14147, 15136,16170]