A357210 - cp's OEIS frontend

A357210 a(n) = Sum_{k=1..n} prime(k/gcd(n,k)).

n	a(n)
1	2
2	4
3	7
4	11
5	19
6	22
7	43
8	46
9	66
10	68
11	131
12	90
13	199
14	158
15	187
16	223
17	383
18	242
19	503
20	320
21	441
22	478
23	793
24	436
25	824
26	716
27	879
28	734
29	1373
30	658
31	1595
32	1118
33	1313
34	1358
35	1579
36	1103
37	2429
38	1776
39	1957
40	1556
41	3089
42	1532
43	3449
44	2192
45	2347
46	2784
47	4229
48	2144
49	4134
50	2882
51	3687
52	3258
53	5591

[2, 4, 7, 11, 19, 22, 43, 46, 66, 68, 131, 90, 199, 158, 187, 223, 383, 242, 503, 320, 441, 478, 793, 436, 824, 716, 879, 734, 1373, 658, 1595, 1118, 1313, 1358, 1579, 1103, 2429, 1776, 1957, 1556, 3089, 1532, 3449, 2192, 2347, 2784, 4229, 2144, 4134, 2882, 3687, 3258, 5591]

cp's OEIS Frontend

A357210 a(n) = Sum_{k=1..n} prime(k/gcd(n,k)).

Table of values

List of values