A111409 - cp's OEIS frontend

A111409 a(n) = f(f(n+1)) - f(f(n)), where f(0)=0, and for m>0, f(m) = phi(m) = A000010(m).

n	a(n)
0	1
1	0
2	0
3	0
4	1
5	-1
6	1
7	0
8	0
9	0
10	2
11	-2
12	2
13	-2
14	2
15	0
16	4
17	-6
18	4
19	-2
20	0
21	0
22	6
23	-6
24	4
25	-4
26	2
27	-2
28	8
29	-8
30	4
31	0
32	0
33	0
34	0
35	-4
36	8
37	-6
38	2
39	0
40	8
41	-12
42	8
43	-4
44	0
45	2
46	12
47	-14
48	4
49	-4
50	8
51	-8
52	16
53	-18
54	10
55	-8
56	4
57	0
58	16
59	-20
60	8
61	-8
62	4
63	4
64	0
65	-8
66	12
67	-4
68	4
69	-12
70	16
71	-16
72	16
73	-12
74	4
75	-4
76	4
77	-8
78	16
79	-8
80	2
81	-2
82	24
83	-32
84	24
85	-20
86	12
87	-8
88	24
89	-32
90	16
91	-4
92	-4
93	6

[1, 0, 0, 0, 1, -1, 1, 0, 0, 0, 2, -2, 2, -2, 2, 0, 4, -6, 4, -2, 0, 0, 6, -6, 4, -4, 2, -2, 8, -8, 4, 0, 0, 0, 0, -4, 8, -6, 2, 0, 8, -12, 8, -4, 0, 2, 12, -14, 4, -4, 8, -8, 16, -18, 10, -8, 4, 0, 16, -20, 8, -8, 4, 4, 0, -8, 12, -4, 4, -12, 16, -16, 16, -12, 4, -4, 4, -8, 16, -8, 2, -2, 24, -32, 24, -20, 12, -8, 24, -32, 16, -4, -4, 6]

cp's OEIS Frontend

A111409 a(n) = f(f(n+1)) - f(f(n)), where f(0)=0, and for m>0, f(m) = phi(m) = A000010(m).

Table of values

List of values

n	a(n)
0	1
1	0
2	0
3	0
4	1
5	-1
6	1
7	0
8	0
9	0
10	2
11	-2
12	2
13	-2
14	2
15	0
16	4
17	-6
18	4
19	-2
20	0
21	0
22	6
23	-6
24	4
25	-4
26	2
27	-2
28	8
29	-8
30	4
31	0
32	0
33	0
34	0
35	-4
36	8
37	-6
38	2
39	0
40	8
41	-12
42	8
43	-4
44	0
45	2
46	12
47	-14
48	4
49	-4
50	8
51	-8
52	16
53	-18
54	10
55	-8
56	4
57	0
58	16
59	-20
60	8
61	-8
62	4
63	4
64	0
65	-8
66	12
67	-4
68	4
69	-12
70	16
71	-16
72	16
73	-12
74	4
75	-4
76	4
77	-8
78	16
79	-8
80	2
81	-2
82	24
83	-32
84	24
85	-20
86	12
87	-8
88	24
89	-32
90	16
91	-4
92	-4
93	6

n	a(n)
0	1
1	0
2	0
3	0
4	1
5	-1
6	1
7	0
8	0
9	0
10	2
11	-2
12	2
13	-2
14	2
15	0
16	4
17	-6
18	4
19	-2
20	0
21	0
22	6
23	-6
24	4
25	-4
26	2
27	-2
28	8
29	-8
30	4
31	0
32	0
33	0
34	0
35	-4
36	8
37	-6
38	2
39	0
40	8
41	-12
42	8
43	-4
44	0
45	2
46	12
47	-14
48	4
49	-4
50	8
51	-8
52	16
53	-18
54	10
55	-8
56	4
57	0
58	16
59	-20
60	8
61	-8
62	4
63	4
64	0
65	-8
66	12
67	-4
68	4
69	-12
70	16
71	-16
72	16
73	-12
74	4
75	-4
76	4
77	-8
78	16
79	-8
80	2
81	-2
82	24
83	-32
84	24
85	-20
86	12
87	-8
88	24
89	-32
90	16
91	-4
92	-4
93	6

n	a(n)
0	1
1	0
2	0
3	0
4	1
5	-1
6	1
7	0
8	0
9	0
10	2
11	-2
12	2
13	-2
14	2
15	0
16	4
17	-6
18	4
19	-2
20	0
21	0
22	6
23	-6
24	4
25	-4
26	2
27	-2
28	8
29	-8
30	4
31	0
32	0
33	0
34	0
35	-4
36	8
37	-6
38	2
39	0
40	8
41	-12
42	8
43	-4
44	0
45	2
46	12
47	-14
48	4
49	-4
50	8
51	-8
52	16
53	-18
54	10
55	-8
56	4
57	0
58	16
59	-20
60	8
61	-8
62	4
63	4
64	0
65	-8
66	12
67	-4
68	4
69	-12
70	16
71	-16
72	16
73	-12
74	4
75	-4
76	4
77	-8
78	16
79	-8
80	2
81	-2
82	24
83	-32
84	24
85	-20
86	12
87	-8
88	24
89	-32
90	16
91	-4
92	-4
93	6