A266111 - cp's OEIS frontend

A266111 If A082284(n) = 0, a(n) = 1, 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	5
1	4
2	5
3	3
4	2
5	2
6	4
7	1
8	1
9	3
10	3
11	2
12	4
13	1
14	2
15	3
16	2
17	2
18	3
19	1
20	1
21	7
22	2
23	6
24	1
25	1
26	3
27	5
28	1
29	4
30	5
31	3
32	2
33	1
34	4
35	2
36	1
37	1
38	3
39	3
40	1
41	2
42	3
43	1
44	2
45	9
46	2
47	8
48	2
49	1
50	1
51	7
52	1
53	6
54	4
55	1
56	1
57	5
58	3
59	4
60	8
61	3
62	2
63	1
64	1
65	2
66	1
67	1
68	1
69	5
70	2
71	4
72	7
73	3
74	1
75	1
76	9
77	2
78	5
79	1
80	2
81	8
82	4
83	7
84	6
85	1
86	3
87	6
88	1
89	5
90	13
91	6
92	2
93	4
94	12
95	5
96	5
97	4
98	1
99	3
100	1
101	2
102	11
103	1
104	4
105	3
106	10
107	2
108	1
109	1
110	2
111	2
112	1
113	1
114	9
115	3
116	1
117	1
118	8
119	2
120	3
121	7

[5, 4, 5, 3, 2, 2, 4, 1, 1, 3, 3, 2, 4, 1, 2, 3, 2, 2, 3, 1, 1, 7, 2, 6, 1, 1, 3, 5, 1, 4, 5, 3, 2, 1, 4, 2, 1, 1, 3, 3, 1, 2, 3, 1, 2, 9, 2, 8, 2, 1, 1, 7, 1, 6, 4, 1, 1, 5, 3, 4, 8, 3, 2, 1, 1, 2, 1, 1, 1, 5, 2, 4, 7, 3, 1, 1, 9, 2, 5, 1, 2, 8, 4, 7, 6, 1, 3, 6, 1, 5, 13, 6, 2, 4, 12, 5, 5, 4, 1, 3, 1, 2, 11, 1, 4, 3, 10, 2, 1, 1, 2, 2, 1, 1, 9, 3, 1, 1, 8, 2, 3, 7]

cp's OEIS Frontend

A266111 If A082284(n) = 0, a(n) = 1, 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	5
1	4
2	5
3	3
4	2
5	2
6	4
7	1
8	1
9	3
10	3
11	2
12	4
13	1
14	2
15	3
16	2
17	2
18	3
19	1
20	1
21	7
22	2
23	6
24	1
25	1
26	3
27	5
28	1
29	4
30	5
31	3
32	2
33	1
34	4
35	2
36	1
37	1
38	3
39	3
40	1
41	2
42	3
43	1
44	2
45	9
46	2
47	8
48	2
49	1
50	1
51	7
52	1
53	6
54	4
55	1
56	1
57	5
58	3
59	4
60	8
61	3
62	2
63	1
64	1
65	2
66	1
67	1
68	1
69	5
70	2
71	4
72	7
73	3
74	1
75	1
76	9
77	2
78	5
79	1
80	2
81	8
82	4
83	7
84	6
85	1
86	3
87	6
88	1
89	5
90	13
91	6
92	2
93	4
94	12
95	5
96	5
97	4
98	1
99	3
100	1
101	2
102	11
103	1
104	4
105	3
106	10
107	2
108	1
109	1
110	2
111	2
112	1
113	1
114	9
115	3
116	1
117	1
118	8
119	2
120	3
121	7

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

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