A244396 - cp's OEIS frontend

A244396 a(n) = Sum_{k=1, n} phi(k)*index(k, n), with phi(k) the Euler totient A000010(k) and index(k,n) the position of 1/k in the n-th row of the Farey sequence of order k, A049805(n,k).

n	a(n)
1	2
2	5
3	12
4	21
5	39
6	54
7	87
8	117
9	162
10	204
11	279
12	333
13	435
14	516
15	624
16	732
17	900
18	1017
19	1224
20	1380
21	1590
22	1785
23	2082
24	2286
25	2616
26	2886
27	3237
28	3543
29	4005
30	4305
31	4830
32	5238
33	5748
34	6204
35	6816
36	7266
37	8004
38	8571
39	9279
40	9879
41	10779
42	11373
43	12360
44	13110
45	14010
46	14835

[2, 5, 12, 21, 39, 54, 87, 117, 162, 204, 279, 333, 435, 516, 624, 732, 900, 1017, 1224, 1380, 1590, 1785, 2082, 2286, 2616, 2886, 3237, 3543, 4005, 4305, 4830, 5238, 5748, 6204, 6816, 7266, 8004, 8571, 9279, 9879, 10779, 11373, 12360, 13110, 14010, 14835]

cp's OEIS Frontend

A244396 a(n) = Sum_{k=1, n} phi(k)*index(k, n), with phi(k) the Euler totient A000010(k) and index(k,n) the position of 1/k in the n-th row of the Farey sequence of order k, A049805(n,k).

Table of values

List of values