A333293 - cp's OEIS frontend

A333293 a(n) = Sum_{k=1..n-1} k^2phi(k) + n^2phi(n)/2, where phi = A000010.

n	a(n)
2	3
3	14
4	39
5	105
6	191
7	374
8	649
9	1020
10	1463
11	2268
12	3161
13	4463
14	6065
15	7553
16	9477
17	12813
18	16097
19	20318
20	25167
21	29413
22	34479
23	42718
24	50841
25	59395
26	69701
27	80318
28	91583
29	108061
30	123435
31	141450
32	164057
33	183139
34	203277
35	227225
36	249701
37	282119
38	319757
39	351005
40	382057
41	428477
42	472681
43	522094
44	580283
45	623943
46	671519

[3, 14, 39, 105, 191, 374, 649, 1020, 1463, 2268, 3161, 4463, 6065, 7553, 9477, 12813, 16097, 20318, 25167, 29413, 34479, 42718, 50841, 59395, 69701, 80318, 91583, 108061, 123435, 141450, 164057, 183139, 203277, 227225, 249701, 282119, 319757, 351005, 382057, 428477, 472681, 522094, 580283, 623943, 671519]

cp's OEIS Frontend

A333293 a(n) = Sum_{k=1..n-1} k^2phi(k) + n^2phi(n)/2, where phi = A000010.

Table of values

List of values

cp's OEIS Frontend

A333293 a(n) = Sum_{k=1..n-1} k^2*phi(k) + n^2*phi(n)/2, where phi = A000010.

Table of values

List of values

A333293 a(n) = Sum_{k=1..n-1} k^2phi(k) + n^2phi(n)/2, where phi = A000010.