A081850 - cp's OEIS frontend

A081850 Consider recurrence b(0) = (2n+1)/4, b(n) = b(0)*ceiling(b(n-1)); sequence gives number of steps to reach an integer (or -1 if no integer is ever reached).

n	a(n)
2	3
3	2
4	3
5	13
6	1
7	1
8	4
9	2
10	2
11	9
12	2
13	2
14	1
15	1
16	7
17	3
18	7
19	3
20	4
21	3
22	1
23	1
24	2
25	4
26	5
27	10
28	5
29	13
30	1
31	1
32	14
33	8
34	5
35	2
36	10
37	11
38	1
39	1
40	6
41	2
42	2
43	17
44	2
45	2
46	1
47	1
48	3
49	6
50	16
51	5
52	3
53	4
54	1
55	1
56	2
57	4
58	7
59	9
60	4
61	3
62	1
63	1
64	15
65	9
66	4
67	2
68	7
69	5
70	1
71	1
72	3
73	2
74	2
75	3
76	2
77	2
78	1
79	1
80	5
81	5
82	6
83	5
84	6
85	4
86	1
87	1
88	2
89	4
90	4
91	3
92	3
93	11
94	1
95	1
96	3
97	3
98	7
99	2
100	4

[3, 2, 3, 13, 1, 1, 4, 2, 2, 9, 2, 2, 1, 1, 7, 3, 7, 3, 4, 3, 1, 1, 2, 4, 5, 10, 5, 13, 1, 1, 14, 8, 5, 2, 10, 11, 1, 1, 6, 2, 2, 17, 2, 2, 1, 1, 3, 6, 16, 5, 3, 4, 1, 1, 2, 4, 7, 9, 4, 3, 1, 1, 15, 9, 4, 2, 7, 5, 1, 1, 3, 2, 2, 3, 2, 2, 1, 1, 5, 5, 6, 5, 6, 4, 1, 1, 2, 4, 4, 3, 3, 11, 1, 1, 3, 3, 7, 2, 4]

cp's OEIS Frontend

A081850 Consider recurrence b(0) = (2n+1)/4, b(n) = b(0)*ceiling(b(n-1)); sequence gives number of steps to reach an integer (or -1 if no integer is ever reached).

Table of values

List of values

n	a(n)
2	3
3	2
4	3
5	13
6	1
7	1
8	4
9	2
10	2
11	9
12	2
13	2
14	1
15	1
16	7
17	3
18	7
19	3
20	4
21	3
22	1
23	1
24	2
25	4
26	5
27	10
28	5
29	13
30	1
31	1
32	14
33	8
34	5
35	2
36	10
37	11
38	1
39	1
40	6
41	2
42	2
43	17
44	2
45	2
46	1
47	1
48	3
49	6
50	16
51	5
52	3
53	4
54	1
55	1
56	2
57	4
58	7
59	9
60	4
61	3
62	1
63	1
64	15
65	9
66	4
67	2
68	7
69	5
70	1
71	1
72	3
73	2
74	2
75	3
76	2
77	2
78	1
79	1
80	5
81	5
82	6
83	5
84	6
85	4
86	1
87	1
88	2
89	4
90	4
91	3
92	3
93	11
94	1
95	1
96	3
97	3
98	7
99	2
100	4

n	a(n)
2	3
3	2
4	3
5	13
6	1
7	1
8	4
9	2
10	2
11	9
12	2
13	2
14	1
15	1
16	7
17	3
18	7
19	3
20	4
21	3
22	1
23	1
24	2
25	4
26	5
27	10
28	5
29	13
30	1
31	1
32	14
33	8
34	5
35	2
36	10
37	11
38	1
39	1
40	6
41	2
42	2
43	17
44	2
45	2
46	1
47	1
48	3
49	6
50	16
51	5
52	3
53	4
54	1
55	1
56	2
57	4
58	7
59	9
60	4
61	3
62	1
63	1
64	15
65	9
66	4
67	2
68	7
69	5
70	1
71	1
72	3
73	2
74	2
75	3
76	2
77	2
78	1
79	1
80	5
81	5
82	6
83	5
84	6
85	4
86	1
87	1
88	2
89	4
90	4
91	3
92	3
93	11
94	1
95	1
96	3
97	3
98	7
99	2
100	4

n	a(n)
2	3
3	2
4	3
5	13
6	1
7	1
8	4
9	2
10	2
11	9
12	2
13	2
14	1
15	1
16	7
17	3
18	7
19	3
20	4
21	3
22	1
23	1
24	2
25	4
26	5
27	10
28	5
29	13
30	1
31	1
32	14
33	8
34	5
35	2
36	10
37	11
38	1
39	1
40	6
41	2
42	2
43	17
44	2
45	2
46	1
47	1
48	3
49	6
50	16
51	5
52	3
53	4
54	1
55	1
56	2
57	4
58	7
59	9
60	4
61	3
62	1
63	1
64	15
65	9
66	4
67	2
68	7
69	5
70	1
71	1
72	3
73	2
74	2
75	3
76	2
77	2
78	1
79	1
80	5
81	5
82	6
83	5
84	6
85	4
86	1
87	1
88	2
89	4
90	4
91	3
92	3
93	11
94	1
95	1
96	3
97	3
98	7
99	2
100	4