A332681 - cp's OEIS frontend

A332681 a(n) = Sum_{k=1..n} mu(k) * ceiling(n/k)^2.

n	a(n)
1	1
2	3
3	4
4	8
5	11
6	20
7	23
8	35
9	43
10	56
11	63
12	83
13	90
14	115
15	128
16	144
17	159
18	191
19	202
20	238
21	255
22	280
23	299
24	343
25	359
26	400
27	424
28	460
29	483
30	538
31	553
32	613
33	646
34	687
35	720
36	768
37	791
38	864
39	901
40	949
41	980
42	1059
43	1082
44	1166
45	1206
46	1255
47	1298
48	1390
49	1422
50	1506
51	1547
52	1611
53	1658
54	1762

[1, 3, 4, 8, 11, 20, 23, 35, 43, 56, 63, 83, 90, 115, 128, 144, 159, 191, 202, 238, 255, 280, 299, 343, 359, 400, 424, 460, 483, 538, 553, 613, 646, 687, 720, 768, 791, 864, 901, 949, 980, 1059, 1082, 1166, 1206, 1255, 1298, 1390, 1422, 1506, 1547, 1611, 1658, 1762]

cp's OEIS Frontend

A332681 a(n) = Sum_{k=1..n} mu(k) * ceiling(n/k)^2.

Table of values

List of values