A121645 - cp's OEIS frontend

A121645 Consider trajectory of n under the "x->2x+1" map; sequence gives number of steps until a nonsquarefree number is reached.

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

[5, 13, 4, 0, 12, 2, 3, 0, 0, 4, 11, 0, 1, 15, 2, 0, 5, 0, 5, 0, 3, 1, 10, 0, 0, 13, 0, 0, 14, 4, 1, 0, 2, 3, 4, 0, 1, 10, 4, 0, 7, 2, 2, 0, 0, 3, 9, 0, 0, 0, 2, 0, 12, 0, 5, 0, 4, 1, 13, 0, 3, 1, 0, 0, 16, 4, 1, 0, 2, 3, 3, 0, 1, 14, 0, 0, 9, 2, 3, 0, 0, 5, 6, 0, 1, 5, 1, 0, 54, 0, 3, 0, 2, 1, 8, 0, 3, 0, 0]

cp's OEIS Frontend

A121645 Consider trajectory of n under the "x->2x+1" map; sequence gives number of steps until a nonsquarefree number is reached.

Table of values

List of values

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

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

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