A225416 - cp's OEIS frontend

A225416 Number of iterations of the map n -> f(n) needed to reach 0 and starting with n, where f(n) is given by the following definition: f(n) = u(n) mod v(n) where u(n) = max (n, reverse(n)) and v(n) = min(n, reverse(n)).

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

[0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 3, 2, 3, 2, 2, 3, 1, 2, 1, 2, 3, 2, 2, 3, 3, 2, 1, 2, 2, 1, 2, 3, 4, 5, 2, 3, 1, 3, 3, 2, 1, 2, 3, 4, 5, 3, 1, 2, 2, 3, 2, 1, 2, 3, 4, 5, 1, 3, 2, 4, 3, 2, 1, 2, 3, 4, 1, 2, 3, 5, 4, 3, 2, 1, 2, 3, 1, 2, 3, 2, 5, 4, 3]

cp's OEIS Frontend

A225416 Number of iterations of the map n -> f(n) needed to reach 0 and starting with n, where f(n) is given by the following definition: f(n) = u(n) mod v(n) where u(n) = max (n, reverse(n)) and v(n) = min(n, reverse(n)).

Table of values

List of values

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

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

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