A004068 - OEIS

A004068 as a simple table

n	a(n)
0	0
1	1
2	7
3	23
4	54
5	105
6	181
7	287
8	428
9	609
10	835
11	1111
12	1442
13	1833
14	2289
15	2815
16	3416
17	4097
18	4863
19	5719
20	6670
21	7721
22	8877
23	10143
24	11524
25	13025
26	14651
27	16407
28	18298
29	20329
30	22505
31	24831
32	27312
33	29953
34	32759
35	35735
36	38886
37	42217
38	45733
39	49439

[0,1,7,23,54,105,181,287,428,609,835,1111,1442, 1833,2289,2815,3416,4097,4863,5719,6670,7721,8877, 10143,11524,13025,14651,16407,18298,20329,22505, 24831,27312,29953,32759,35735,38886,42217,45733, 49439]