A181540 - cp's OEIS frontend

A181540 a(n) = Sum_{k=0..n} gcd(n,k)*phi(k).

n	a(n)
0	0
1	1
2	3
3	8
4	13
5	26
6	29
7	54
8	59
9	84
10	93
11	142
12	139
13	202
14	195
15	244
16	259
17	352
18	327
19	444
20	433
21	508
22	505
23	656
24	639
25	776
26	719
27	866
28	889
29	1054
30	1057
31	1208
32	1151
33	1332
34	1255
35	1624
36	1575
37	1728
38	1579
39	1886
40	2011
41	2130
42	2159
43	2348
44	2329
45	2716
46	2329

[0, 1, 3, 8, 13, 26, 29, 54, 59, 84, 93, 142, 139, 202, 195, 244, 259, 352, 327, 444, 433, 508, 505, 656, 639, 776, 719, 866, 889, 1054, 1057, 1208, 1151, 1332, 1255, 1624, 1575, 1728, 1579, 1886, 2011, 2130, 2159, 2348, 2329, 2716, 2329]

cp's OEIS Frontend

A181540 a(n) = Sum_{k=0..n} gcd(n,k)*phi(k).

Table of values

List of values