A344721 - cp's OEIS frontend

A344721 a(n) = Sum_{k=1..n} (-1)^(k+1) * floor(n/k)^3.

n	a(n)
1	1
2	7
3	27
4	56
5	118
6	196
7	324
8	448
9	685
10	901
11	1233
12	1549
13	2019
14	2445
15	3157
16	3664
17	4482
18	5262
19	6290
20	7128
21	8536
22	9598
23	11118
24	12392
25	14255
26	15743
27	18087
28	19711
29	22149
30	24417
31	27209
32	29251
33	32771
34	35327
35	39087
36	42048
37	46046
38	49244
39	54180
40	57512
41	62434
42	66838
43	72258
44	76246

[1, 7, 27, 56, 118, 196, 324, 448, 685, 901, 1233, 1549, 2019, 2445, 3157, 3664, 4482, 5262, 6290, 7128, 8536, 9598, 11118, 12392, 14255, 15743, 18087, 19711, 22149, 24417, 27209, 29251, 32771, 35327, 39087, 42048, 46046, 49244, 54180, 57512, 62434, 66838, 72258, 76246]

cp's OEIS Frontend

A344721 a(n) = Sum_{k=1..n} (-1)^(k+1) * floor(n/k)^3.

Table of values

List of values