A025206 - OEIS

A025206 as a simple table

n	a(n)
3	0
4	0
5	1
6	3
7	6
8	10
9	14
10	20
11	27
12	35
13	45
14	55
15	67
16	81
17	96
18	112
19	129
20	148
21	169
22	191
23	214
24	239
25	266
26	294
27	324
28	355
29	388
30	422
31	458
32	496
33	535
34	576
35	618
36	662
37	708
38	756
39	805
40	855
41	908
42	962
43	1018
44	1076
45	1135
46	1196
47	1258
48	1323
49	1389
50	1457
51	1526
52	1598
53	1671
54	1746
55	1822
56	1900
57	1980
58	2062

[0,0,1,3,6,10,14,20,27,35,45,55,67,81,96,112,129, 148,169,191,214,239,266,294,324,355,388,422,458, 496,535,576,618,662,708,756,805,855,908,962,1018, 1076,1135,1196,1258,1323,1389,1457,1526,1598,1671, 1746,1822,1900,1980,2062]