A073524 - cp's OEIS frontend

A073524 Number of steps to reach an integer starting with (n+1)/n and using the map x -> x*ceiling(x); or -1 if no integer is ever reached.

n	a(n)
1	0
2	1
3	2
4	3
5	18
6	2
7	3
8	4
9	6
10	7
11	26
12	4
13	9
14	3
15	4
16	8
17	6
18	4
19	56
20	11
21	3
22	4
23	42
24	4
25	33
26	7
27	5
28	4
29	38
30	5
31	79
32	6
33	4
34	15
35	14
36	8
37	200
38	29
39	13
40	5
41	36
42	3
43	4
44	5
45	7
46	10
47	11
48	8
49	6
50	20
51	47
52	27
53	43
54	9
55	41
56	9
57	10
58	23
59	37
60	17
61	18
62	6
63	7
64	6
65	32
66	15
67	225
68	7
69	73
70	11
71	20
72	12
73	182
74	9
75	16
76	7
77	10
78	15
79	196
80	8

[0, 1, 2, 3, 18, 2, 3, 4, 6, 7, 26, 4, 9, 3, 4, 8, 6, 4, 56, 11, 3, 4, 42, 4, 33, 7, 5, 4, 38, 5, 79, 6, 4, 15, 14, 8, 200, 29, 13, 5, 36, 3, 4, 5, 7, 10, 11, 8, 6, 20, 47, 27, 43, 9, 41, 9, 10, 23, 37, 17, 18, 6, 7, 6, 32, 15, 225, 7, 73, 11, 20, 12, 182, 9, 16, 7, 10, 15, 196, 8]

cp's OEIS Frontend

A073524 Number of steps to reach an integer starting with (n+1)/n and using the map x -> x*ceiling(x); or -1 if no integer is ever reached.

Table of values

List of values

n	a(n)
1	0
2	1
3	2
4	3
5	18
6	2
7	3
8	4
9	6
10	7
11	26
12	4
13	9
14	3
15	4
16	8
17	6
18	4
19	56
20	11
21	3
22	4
23	42
24	4
25	33
26	7
27	5
28	4
29	38
30	5
31	79
32	6
33	4
34	15
35	14
36	8
37	200
38	29
39	13
40	5
41	36
42	3
43	4
44	5
45	7
46	10
47	11
48	8
49	6
50	20
51	47
52	27
53	43
54	9
55	41
56	9
57	10
58	23
59	37
60	17
61	18
62	6
63	7
64	6
65	32
66	15
67	225
68	7
69	73
70	11
71	20
72	12
73	182
74	9
75	16
76	7
77	10
78	15
79	196
80	8

n	a(n)
1	0
2	1
3	2
4	3
5	18
6	2
7	3
8	4
9	6
10	7
11	26
12	4
13	9
14	3
15	4
16	8
17	6
18	4
19	56
20	11
21	3
22	4
23	42
24	4
25	33
26	7
27	5
28	4
29	38
30	5
31	79
32	6
33	4
34	15
35	14
36	8
37	200
38	29
39	13
40	5
41	36
42	3
43	4
44	5
45	7
46	10
47	11
48	8
49	6
50	20
51	47
52	27
53	43
54	9
55	41
56	9
57	10
58	23
59	37
60	17
61	18
62	6
63	7
64	6
65	32
66	15
67	225
68	7
69	73
70	11
71	20
72	12
73	182
74	9
75	16
76	7
77	10
78	15
79	196
80	8

n	a(n)
1	0
2	1
3	2
4	3
5	18
6	2
7	3
8	4
9	6
10	7
11	26
12	4
13	9
14	3
15	4
16	8
17	6
18	4
19	56
20	11
21	3
22	4
23	42
24	4
25	33
26	7
27	5
28	4
29	38
30	5
31	79
32	6
33	4
34	15
35	14
36	8
37	200
38	29
39	13
40	5
41	36
42	3
43	4
44	5
45	7
46	10
47	11
48	8
49	6
50	20
51	47
52	27
53	43
54	9
55	41
56	9
57	10
58	23
59	37
60	17
61	18
62	6
63	7
64	6
65	32
66	15
67	225
68	7
69	73
70	11
71	20
72	12
73	182
74	9
75	16
76	7
77	10
78	15
79	196
80	8