A266110 - cp's OEIS frontend

A266110 If A082284(n) = 0, a(n) = 0, otherwise a(n) = 1 + a(A082284(n)), where A082284(n) = smallest number k such that k - d(k) = n, or 0 if no such number exists, and d(n) = the number of divisors of n (A000005).

n	a(n)
0	4
1	3
2	4
3	2
4	1
5	1
6	3
7	0
8	0
9	2
10	2
11	1
12	3
13	0
14	1
15	2
16	1
17	1
18	2
19	0
20	0
21	6
22	1
23	5
24	0
25	0
26	2
27	4
28	0
29	3
30	4
31	2
32	1
33	0
34	3
35	1
36	0
37	0
38	2
39	2
40	0
41	1
42	2
43	0
44	1
45	8
46	1
47	7
48	1
49	0
50	0
51	6
52	0
53	5
54	3
55	0
56	0
57	4
58	2
59	3
60	7
61	2
62	1
63	0
64	0
65	1
66	0
67	0
68	0
69	4
70	1
71	3
72	6
73	2
74	0
75	0
76	8
77	1
78	4
79	0
80	1
81	7
82	3
83	6
84	5
85	0
86	2
87	5
88	0
89	4
90	12
91	5
92	1
93	3
94	11
95	4
96	4
97	3
98	0
99	2
100	0
101	1
102	10
103	0
104	3
105	2
106	9
107	1
108	0
109	0
110	1
111	1
112	0
113	0
114	8
115	2
116	0
117	0
118	7
119	1
120	2
121	6

[4, 3, 4, 2, 1, 1, 3, 0, 0, 2, 2, 1, 3, 0, 1, 2, 1, 1, 2, 0, 0, 6, 1, 5, 0, 0, 2, 4, 0, 3, 4, 2, 1, 0, 3, 1, 0, 0, 2, 2, 0, 1, 2, 0, 1, 8, 1, 7, 1, 0, 0, 6, 0, 5, 3, 0, 0, 4, 2, 3, 7, 2, 1, 0, 0, 1, 0, 0, 0, 4, 1, 3, 6, 2, 0, 0, 8, 1, 4, 0, 1, 7, 3, 6, 5, 0, 2, 5, 0, 4, 12, 5, 1, 3, 11, 4, 4, 3, 0, 2, 0, 1, 10, 0, 3, 2, 9, 1, 0, 0, 1, 1, 0, 0, 8, 2, 0, 0, 7, 1, 2, 6]

cp's OEIS Frontend

A266110 If A082284(n) = 0, a(n) = 0, otherwise a(n) = 1 + a(A082284(n)), where A082284(n) = smallest number k such that k - d(k) = n, or 0 if no such number exists, and d(n) = the number of divisors of n (A000005).

Table of values

List of values

n	a(n)
0	4
1	3
2	4
3	2
4	1
5	1
6	3
7	0
8	0
9	2
10	2
11	1
12	3
13	0
14	1
15	2
16	1
17	1
18	2
19	0
20	0
21	6
22	1
23	5
24	0
25	0
26	2
27	4
28	0
29	3
30	4
31	2
32	1
33	0
34	3
35	1
36	0
37	0
38	2
39	2
40	0
41	1
42	2
43	0
44	1
45	8
46	1
47	7
48	1
49	0
50	0
51	6
52	0
53	5
54	3
55	0
56	0
57	4
58	2
59	3
60	7
61	2
62	1
63	0
64	0
65	1
66	0
67	0
68	0
69	4
70	1
71	3
72	6
73	2
74	0
75	0
76	8
77	1
78	4
79	0
80	1
81	7
82	3
83	6
84	5
85	0
86	2
87	5
88	0
89	4
90	12
91	5
92	1
93	3
94	11
95	4
96	4
97	3
98	0
99	2
100	0
101	1
102	10
103	0
104	3
105	2
106	9
107	1
108	0
109	0
110	1
111	1
112	0
113	0
114	8
115	2
116	0
117	0
118	7
119	1
120	2
121	6

n	a(n)
0	4
1	3
2	4
3	2
4	1
5	1
6	3
7	0
8	0
9	2
10	2
11	1
12	3
13	0
14	1
15	2
16	1
17	1
18	2
19	0
20	0
21	6
22	1
23	5
24	0
25	0
26	2
27	4
28	0
29	3
30	4
31	2
32	1
33	0
34	3
35	1
36	0
37	0
38	2
39	2
40	0
41	1
42	2
43	0
44	1
45	8
46	1
47	7
48	1
49	0
50	0
51	6
52	0
53	5
54	3
55	0
56	0
57	4
58	2
59	3
60	7
61	2
62	1
63	0
64	0
65	1
66	0
67	0
68	0
69	4
70	1
71	3
72	6
73	2
74	0
75	0
76	8
77	1
78	4
79	0
80	1
81	7
82	3
83	6
84	5
85	0
86	2
87	5
88	0
89	4
90	12
91	5
92	1
93	3
94	11
95	4
96	4
97	3
98	0
99	2
100	0
101	1
102	10
103	0
104	3
105	2
106	9
107	1
108	0
109	0
110	1
111	1
112	0
113	0
114	8
115	2
116	0
117	0
118	7
119	1
120	2
121	6

n	a(n)
0	4
1	3
2	4
3	2
4	1
5	1
6	3
7	0
8	0
9	2
10	2
11	1
12	3
13	0
14	1
15	2
16	1
17	1
18	2
19	0
20	0
21	6
22	1
23	5
24	0
25	0
26	2
27	4
28	0
29	3
30	4
31	2
32	1
33	0
34	3
35	1
36	0
37	0
38	2
39	2
40	0
41	1
42	2
43	0
44	1
45	8
46	1
47	7
48	1
49	0
50	0
51	6
52	0
53	5
54	3
55	0
56	0
57	4
58	2
59	3
60	7
61	2
62	1
63	0
64	0
65	1
66	0
67	0
68	0
69	4
70	1
71	3
72	6
73	2
74	0
75	0
76	8
77	1
78	4
79	0
80	1
81	7
82	3
83	6
84	5
85	0
86	2
87	5
88	0
89	4
90	12
91	5
92	1
93	3
94	11
95	4
96	4
97	3
98	0
99	2
100	0
101	1
102	10
103	0
104	3
105	2
106	9
107	1
108	0
109	0
110	1
111	1
112	0
113	0
114	8
115	2
116	0
117	0
118	7
119	1
120	2
121	6