A098282 - cp's OEIS frontend

A098282 Iterate the map k -> A087712(k) starting at n; a(n) is the number of steps at which we see a repeated term for the first time; or -1 if the trajectory never repeats.

n	a(n)
1	1
2	2
3	3
4	6
5	4
6	31
7	7
8	55
9	4
10	33
11	5
12	30
13	32
14	1
15	4
16	19
17	8
18	112
19	56
20	16
21	27
22	4
23	4
24	26
25	2
26	20
27	223
28	102
29	34
30	14
31	6
32	162
33	2
34	9
35	10
36	75
37	31
38	113
39	21
40	100
41	33
42	20
43	2
44	23
45	30
46	57
47	5
48	28
49	24
50	30
51	224
52	269
53	20
54	295
55	11
56	85
57	103
58	140
59	9
60	71
61	113
62	55
63	34
64	110
65	76
66	49
67	57

[1, 2, 3, 6, 4, 31, 7, 55, 4, 33, 5, 30, 32, 1, 4, 19, 8, 112, 56, 16, 27, 4, 4, 26, 2, 20, 223, 102, 34, 14, 6, 162, 2, 9, 10, 75, 31, 113, 21, 100, 33, 20, 2, 23, 30, 57, 5, 28, 24, 30, 224, 269, 20, 295, 11, 85, 103, 140, 9, 71, 113, 55, 34, 110, 76, 49, 57]

cp's OEIS Frontend

A098282 Iterate the map k -> A087712(k) starting at n; a(n) is the number of steps at which we see a repeated term for the first time; or -1 if the trajectory never repeats.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	6
5	4
6	31
7	7
8	55
9	4
10	33
11	5
12	30
13	32
14	1
15	4
16	19
17	8
18	112
19	56
20	16
21	27
22	4
23	4
24	26
25	2
26	20
27	223
28	102
29	34
30	14
31	6
32	162
33	2
34	9
35	10
36	75
37	31
38	113
39	21
40	100
41	33
42	20
43	2
44	23
45	30
46	57
47	5
48	28
49	24
50	30
51	224
52	269
53	20
54	295
55	11
56	85
57	103
58	140
59	9
60	71
61	113
62	55
63	34
64	110
65	76
66	49
67	57

n	a(n)
1	1
2	2
3	3
4	6
5	4
6	31
7	7
8	55
9	4
10	33
11	5
12	30
13	32
14	1
15	4
16	19
17	8
18	112
19	56
20	16
21	27
22	4
23	4
24	26
25	2
26	20
27	223
28	102
29	34
30	14
31	6
32	162
33	2
34	9
35	10
36	75
37	31
38	113
39	21
40	100
41	33
42	20
43	2
44	23
45	30
46	57
47	5
48	28
49	24
50	30
51	224
52	269
53	20
54	295
55	11
56	85
57	103
58	140
59	9
60	71
61	113
62	55
63	34
64	110
65	76
66	49
67	57

n	a(n)
1	1
2	2
3	3
4	6
5	4
6	31
7	7
8	55
9	4
10	33
11	5
12	30
13	32
14	1
15	4
16	19
17	8
18	112
19	56
20	16
21	27
22	4
23	4
24	26
25	2
26	20
27	223
28	102
29	34
30	14
31	6
32	162
33	2
34	9
35	10
36	75
37	31
38	113
39	21
40	100
41	33
42	20
43	2
44	23
45	30
46	57
47	5
48	28
49	24
50	30
51	224
52	269
53	20
54	295
55	11
56	85
57	103
58	140
59	9
60	71
61	113
62	55
63	34
64	110
65	76
66	49
67	57