A118514 - cp's OEIS frontend

A118514 Define sequence S_n by: initial term = n, reverse digits and add 2 to get next term. It is conjectured that S_n always reaches a cycle. Sequence gives number of steps for S_n to reach a cycle.

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

[1, 3, 0, 2, 0, 1, 0, 0, 0, 0, 0, 9, 0, 7, 10, 0, 9, 4, 0, 3, 8, 8, 8, 7, 15, 5, 5, 3, 12, 1, 11, 16, 0, 7, 0, 5, 8, 0, 7, 2, 0, 6, 6, 6, 6, 5, 13, 3, 3, 1, 10, 6, 9, 14, 0, 5, 0, 3, 6, 0, 5, 4, 0, 4, 4, 4, 4, 3, 11, 1, 1, 13, 8, 4, 7, 12, 0, 3, 0, 1, 4, 2, 3, 2, 0, 2, 2, 2, 2, 1, 9, 12, 0]

cp's OEIS Frontend

A118514 Define sequence S_n by: initial term = n, reverse digits and add 2 to get next term. It is conjectured that S_n always reaches a cycle. Sequence gives number of steps for S_n to reach a cycle.

Table of values

List of values

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

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

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