A111407 - cp's OEIS frontend

A111407 a(n) = f(f(n+1)) - f(f(n)), where f(0) = 0 and f(m) = tau(m) = A000005(m) for m > 0.

n	a(n)
0	1
1	1
2	0
3	0
4	0
5	1
6	-1
7	1
8	-1
9	1
10	-1
11	2
12	-2
13	1
14	0
15	-1
16	0
17	2
18	-2
19	2
20	-1
21	0
22	-1
23	2
24	-2
25	1
26	0
27	1
28	-2
29	2
30	-2
31	2
32	-1
33	0
34	0
35	0
36	-1
37	1
38	0
39	1
40	-2
41	2
42	-2
43	2
44	0
45	-1
46	-1
47	2
48	-2
49	2
50	-1
51	1
52	-2
53	2
54	-1
55	1
56	-1
57	0
58	-1
59	4
60	-4
61	1
62	1
63	-2
64	1
65	1
66	-2
67	2
68	-1
69	1
70	-2
71	4
72	-4
73	1
74	1
75	0
76	-1
77	1
78	-2
79	2
80	-2
81	1
82	-1
83	4
84	-3
85	0
86	0
87	1
88	-2
89	4
90	-3
91	1
92	-1
93	0
94	0
95	3
96	-4
97	2
98	0
99	-1
100	-1

[1, 1, 0, 0, 0, 1, -1, 1, -1, 1, -1, 2, -2, 1, 0, -1, 0, 2, -2, 2, -1, 0, -1, 2, -2, 1, 0, 1, -2, 2, -2, 2, -1, 0, 0, 0, -1, 1, 0, 1, -2, 2, -2, 2, 0, -1, -1, 2, -2, 2, -1, 1, -2, 2, -1, 1, -1, 0, -1, 4, -4, 1, 1, -2, 1, 1, -2, 2, -1, 1, -2, 4, -4, 1, 1, 0, -1, 1, -2, 2, -2, 1, -1, 4, -3, 0, 0, 1, -2, 4, -3, 1, -1, 0, 0, 3, -4, 2, 0, -1, -1]

cp's OEIS Frontend

A111407 a(n) = f(f(n+1)) - f(f(n)), where f(0) = 0 and f(m) = tau(m) = A000005(m) for m > 0.

Table of values

List of values

n	a(n)
0	1
1	1
2	0
3	0
4	0
5	1
6	-1
7	1
8	-1
9	1
10	-1
11	2
12	-2
13	1
14	0
15	-1
16	0
17	2
18	-2
19	2
20	-1
21	0
22	-1
23	2
24	-2
25	1
26	0
27	1
28	-2
29	2
30	-2
31	2
32	-1
33	0
34	0
35	0
36	-1
37	1
38	0
39	1
40	-2
41	2
42	-2
43	2
44	0
45	-1
46	-1
47	2
48	-2
49	2
50	-1
51	1
52	-2
53	2
54	-1
55	1
56	-1
57	0
58	-1
59	4
60	-4
61	1
62	1
63	-2
64	1
65	1
66	-2
67	2
68	-1
69	1
70	-2
71	4
72	-4
73	1
74	1
75	0
76	-1
77	1
78	-2
79	2
80	-2
81	1
82	-1
83	4
84	-3
85	0
86	0
87	1
88	-2
89	4
90	-3
91	1
92	-1
93	0
94	0
95	3
96	-4
97	2
98	0
99	-1
100	-1

n	a(n)
0	1
1	1
2	0
3	0
4	0
5	1
6	-1
7	1
8	-1
9	1
10	-1
11	2
12	-2
13	1
14	0
15	-1
16	0
17	2
18	-2
19	2
20	-1
21	0
22	-1
23	2
24	-2
25	1
26	0
27	1
28	-2
29	2
30	-2
31	2
32	-1
33	0
34	0
35	0
36	-1
37	1
38	0
39	1
40	-2
41	2
42	-2
43	2
44	0
45	-1
46	-1
47	2
48	-2
49	2
50	-1
51	1
52	-2
53	2
54	-1
55	1
56	-1
57	0
58	-1
59	4
60	-4
61	1
62	1
63	-2
64	1
65	1
66	-2
67	2
68	-1
69	1
70	-2
71	4
72	-4
73	1
74	1
75	0
76	-1
77	1
78	-2
79	2
80	-2
81	1
82	-1
83	4
84	-3
85	0
86	0
87	1
88	-2
89	4
90	-3
91	1
92	-1
93	0
94	0
95	3
96	-4
97	2
98	0
99	-1
100	-1

n	a(n)
0	1
1	1
2	0
3	0
4	0
5	1
6	-1
7	1
8	-1
9	1
10	-1
11	2
12	-2
13	1
14	0
15	-1
16	0
17	2
18	-2
19	2
20	-1
21	0
22	-1
23	2
24	-2
25	1
26	0
27	1
28	-2
29	2
30	-2
31	2
32	-1
33	0
34	0
35	0
36	-1
37	1
38	0
39	1
40	-2
41	2
42	-2
43	2
44	0
45	-1
46	-1
47	2
48	-2
49	2
50	-1
51	1
52	-2
53	2
54	-1
55	1
56	-1
57	0
58	-1
59	4
60	-4
61	1
62	1
63	-2
64	1
65	1
66	-2
67	2
68	-1
69	1
70	-2
71	4
72	-4
73	1
74	1
75	0
76	-1
77	1
78	-2
79	2
80	-2
81	1
82	-1
83	4
84	-3
85	0
86	0
87	1
88	-2
89	4
90	-3
91	1
92	-1
93	0
94	0
95	3
96	-4
97	2
98	0
99	-1
100	-1