A370899 - cp's OEIS frontend

A370899 Partial alternating sums of the unitary totient function (A047994).

n	a(n)
1	1
2	0
3	2
4	-1
5	3
6	1
7	7
8	0
9	8
10	4
11	14
12	8
13	20
14	14
15	22
16	7
17	23
18	15
19	33
20	21
21	33
22	23
23	45
24	31
25	55
26	43
27	69
28	51
29	79
30	71
31	101
32	70
33	90
34	74
35	98
36	74
37	110
38	92
39	116
40	88
41	128
42	116
43	158
44	128
45	160
46	138
47	184
48	154
49	202
50	178
51	210
52	174
53	226
54	200
55	240
56	198
57	234
58	206
59	264
60	240
61	300
62	270

[1, 0, 2, -1, 3, 1, 7, 0, 8, 4, 14, 8, 20, 14, 22, 7, 23, 15, 33, 21, 33, 23, 45, 31, 55, 43, 69, 51, 79, 71, 101, 70, 90, 74, 98, 74, 110, 92, 116, 88, 128, 116, 158, 128, 160, 138, 184, 154, 202, 178, 210, 174, 226, 200, 240, 198, 234, 206, 264, 240, 300, 270]

cp's OEIS Frontend

A370899 Partial alternating sums of the unitary totient function (A047994).

Table of values

List of values

n	a(n)
1	1
2	0
3	2
4	-1
5	3
6	1
7	7
8	0
9	8
10	4
11	14
12	8
13	20
14	14
15	22
16	7
17	23
18	15
19	33
20	21
21	33
22	23
23	45
24	31
25	55
26	43
27	69
28	51
29	79
30	71
31	101
32	70
33	90
34	74
35	98
36	74
37	110
38	92
39	116
40	88
41	128
42	116
43	158
44	128
45	160
46	138
47	184
48	154
49	202
50	178
51	210
52	174
53	226
54	200
55	240
56	198
57	234
58	206
59	264
60	240
61	300
62	270

n	a(n)
1	1
2	0
3	2
4	-1
5	3
6	1
7	7
8	0
9	8
10	4
11	14
12	8
13	20
14	14
15	22
16	7
17	23
18	15
19	33
20	21
21	33
22	23
23	45
24	31
25	55
26	43
27	69
28	51
29	79
30	71
31	101
32	70
33	90
34	74
35	98
36	74
37	110
38	92
39	116
40	88
41	128
42	116
43	158
44	128
45	160
46	138
47	184
48	154
49	202
50	178
51	210
52	174
53	226
54	200
55	240
56	198
57	234
58	206
59	264
60	240
61	300
62	270

n	a(n)
1	1
2	0
3	2
4	-1
5	3
6	1
7	7
8	0
9	8
10	4
11	14
12	8
13	20
14	14
15	22
16	7
17	23
18	15
19	33
20	21
21	33
22	23
23	45
24	31
25	55
26	43
27	69
28	51
29	79
30	71
31	101
32	70
33	90
34	74
35	98
36	74
37	110
38	92
39	116
40	88
41	128
42	116
43	158
44	128
45	160
46	138
47	184
48	154
49	202
50	178
51	210
52	174
53	226
54	200
55	240
56	198
57	234
58	206
59	264
60	240
61	300
62	270