A339804 - cp's OEIS frontend

A339804 a(n) = Sum_{k=1..floor(n/2)} k * (n-k) * floor((n-k)/k).

n	a(n)
1	0
2	1
3	4
4	13
5	22
6	50
7	68
8	116
9	162
10	236
11	278
12	437
13	498
14	634
15	794
16	1018
17	1118
18	1450
19	1574
20	1975
21	2276
22	2598
23	2774
24	3519
25	3834
26	4273
27	4746
28	5490
29	5772
30	6887
31	7214
32	8163
33	8856
34	9586
35	10330
36	12072
37	12540
38	13443
39	14382
40	16244
41	16806
42	18861
43	19480
44	21192
45	22954
46	24267

[0, 1, 4, 13, 22, 50, 68, 116, 162, 236, 278, 437, 498, 634, 794, 1018, 1118, 1450, 1574, 1975, 2276, 2598, 2774, 3519, 3834, 4273, 4746, 5490, 5772, 6887, 7214, 8163, 8856, 9586, 10330, 12072, 12540, 13443, 14382, 16244, 16806, 18861, 19480, 21192, 22954, 24267]

cp's OEIS Frontend

A339804 a(n) = Sum_{k=1..floor(n/2)} k * (n-k) * floor((n-k)/k).

Table of values

List of values