A355947 - cp's OEIS frontend

A355947 a(n) = Sum_{k=1..n} (n+1-k)*floor(n/k).

n	a(n)
0	0
1	1
2	5
3	12
4	25
5	39
6	65
7	87
8	124
9	161
10	210
11	249
12	328
13	377
14	450
15	531
16	630
17	698
18	825
19	903
20	1047
21	1169
22	1295
23	1393
24	1609
25	1740
26	1893
27	2056
28	2269
29	2400
30	2679
31	2822
32	3070
33	3277
34	3486
35	3709
36	4082
37	4260
38	4498
39	4748
40	5136
41	5336
42	5744
43	5956
44	6312
45	6686
46	6984
47	7218
48	7772

[0, 1, 5, 12, 25, 39, 65, 87, 124, 161, 210, 249, 328, 377, 450, 531, 630, 698, 825, 903, 1047, 1169, 1295, 1393, 1609, 1740, 1893, 2056, 2269, 2400, 2679, 2822, 3070, 3277, 3486, 3709, 4082, 4260, 4498, 4748, 5136, 5336, 5744, 5956, 6312, 6686, 6984, 7218, 7772]

cp's OEIS Frontend

A355947 a(n) = Sum_{k=1..n} (n+1-k)*floor(n/k).

Table of values

List of values