A333170 - cp's OEIS frontend

A333170 a(n) = Sum_{k=0..n} phi(k^2 + 1), where phi is the Euler totient function (A000010).

n	a(n)
0	1
1	2
2	6
3	10
4	26
5	38
6	74
7	94
8	142
9	182
10	282
11	342
12	454
13	518
14	714
15	826
16	1082
17	1194
18	1434
19	1614
20	2014
21	2206
22	2590
23	2798
24	3374
25	3686
26	4362
27	4650
28	5274
29	5694
30	6526
31	6958
32	7758
33	8190
34	9246
35	9858
36	11154
37	11698
38	12786
39	13546
40	15146
41	15958
42	17366
43	18086
44	19862
45	20874

[1, 2, 6, 10, 26, 38, 74, 94, 142, 182, 282, 342, 454, 518, 714, 826, 1082, 1194, 1434, 1614, 2014, 2206, 2590, 2798, 3374, 3686, 4362, 4650, 5274, 5694, 6526, 6958, 7758, 8190, 9246, 9858, 11154, 11698, 12786, 13546, 15146, 15958, 17366, 18086, 19862, 20874]

cp's OEIS Frontend

A333170 a(n) = Sum_{k=0..n} phi(k^2 + 1), where phi is the Euler totient function (A000010).

Table of values

List of values