A318367 - cp's OEIS frontend

A318367 a(n) = Sum_{d|n} (-1)^(n/d+1)dprime(d).

n	a(n)
1	2
2	4
3	17
4	20
5	57
6	67
7	121
8	116
9	224
10	239
11	343
12	371
13	535
14	487
15	777
16	660
17	1005
18	958
19	1275
20	1095
21	1669
22	1401
23	1911
24	1715
25	2482
26	2097
27	3005
28	2295
29	3163
30	2987
31	3939
32	3156
33	4879
34	3727
35	5391
36	4502
37	5811
38	4925
39	7063
40	5271
41	7341
42	6619
43	8215
44	6433
45	9849
46	7249
47	9919
48	8691
49	11244
50	9264

[2, 4, 17, 20, 57, 67, 121, 116, 224, 239, 343, 371, 535, 487, 777, 660, 1005, 958, 1275, 1095, 1669, 1401, 1911, 1715, 2482, 2097, 3005, 2295, 3163, 2987, 3939, 3156, 4879, 3727, 5391, 4502, 5811, 4925, 7063, 5271, 7341, 6619, 8215, 6433, 9849, 7249, 9919, 8691, 11244, 9264]

cp's OEIS Frontend

A318367 a(n) = Sum_{d|n} (-1)^(n/d+1)dprime(d).

Table of values

List of values

cp's OEIS Frontend

A318367 a(n) = Sum_{d|n} (-1)^(n/d+1)*d*prime(d).

Table of values

List of values

A318367 a(n) = Sum_{d|n} (-1)^(n/d+1)dprime(d).