A087664 - cp's OEIS frontend

A087664 Consider recurrence b(0) = n/4, b(k) = b(k-1)*floor(b(k-1)); sequence gives number of steps to reach an integer, or -1 if no integer is ever reached.

n	a(n)
8	0
9	2
10	1
11	4
12	0
13	5
14	2
15	9
16	0
17	1
18	1
19	1
20	0
21	3
22	3
23	2
24	0
25	4
26	1
27	2
28	0
29	6
30	2
31	7
32	0
33	1
34	1
35	1
36	0
37	5
38	4
39	4
40	0
41	2
42	1
43	3
44	0
45	8
46	2
47	7
48	0
49	1
50	1
51	1
52	0
53	2
54	3
55	6
56	0
57	3
58	1
59	2
60	0
61	2
62	2
63	2
64	0
65	1
66	1
67	1
68	0
69	4
70	5
71	5
72	0
73	2
74	1
75	6
76	0
77	5
78	2
79	4
80	0
81	1
82	1
83	1
84	0
85	4
86	3
87	2
88	0
89	5
90	1
91	2
92	0
93	3
94	2
95	3
96	0
97	1
98	1
99	1
100	0
101	4
102	4
103	6
104	0
105	2
106	1
107	3
108	0
109	3
110	2
111	3
112	0

[0, 2, 1, 4, 0, 5, 2, 9, 0, 1, 1, 1, 0, 3, 3, 2, 0, 4, 1, 2, 0, 6, 2, 7, 0, 1, 1, 1, 0, 5, 4, 4, 0, 2, 1, 3, 0, 8, 2, 7, 0, 1, 1, 1, 0, 2, 3, 6, 0, 3, 1, 2, 0, 2, 2, 2, 0, 1, 1, 1, 0, 4, 5, 5, 0, 2, 1, 6, 0, 5, 2, 4, 0, 1, 1, 1, 0, 4, 3, 2, 0, 5, 1, 2, 0, 3, 2, 3, 0, 1, 1, 1, 0, 4, 4, 6, 0, 2, 1, 3, 0, 3, 2, 3, 0]

cp's OEIS Frontend

A087664 Consider recurrence b(0) = n/4, b(k) = b(k-1)*floor(b(k-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)
8	0
9	2
10	1
11	4
12	0
13	5
14	2
15	9
16	0
17	1
18	1
19	1
20	0
21	3
22	3
23	2
24	0
25	4
26	1
27	2
28	0
29	6
30	2
31	7
32	0
33	1
34	1
35	1
36	0
37	5
38	4
39	4
40	0
41	2
42	1
43	3
44	0
45	8
46	2
47	7
48	0
49	1
50	1
51	1
52	0
53	2
54	3
55	6
56	0
57	3
58	1
59	2
60	0
61	2
62	2
63	2
64	0
65	1
66	1
67	1
68	0
69	4
70	5
71	5
72	0
73	2
74	1
75	6
76	0
77	5
78	2
79	4
80	0
81	1
82	1
83	1
84	0
85	4
86	3
87	2
88	0
89	5
90	1
91	2
92	0
93	3
94	2
95	3
96	0
97	1
98	1
99	1
100	0
101	4
102	4
103	6
104	0
105	2
106	1
107	3
108	0
109	3
110	2
111	3
112	0

n	a(n)
8	0
9	2
10	1
11	4
12	0
13	5
14	2
15	9
16	0
17	1
18	1
19	1
20	0
21	3
22	3
23	2
24	0
25	4
26	1
27	2
28	0
29	6
30	2
31	7
32	0
33	1
34	1
35	1
36	0
37	5
38	4
39	4
40	0
41	2
42	1
43	3
44	0
45	8
46	2
47	7
48	0
49	1
50	1
51	1
52	0
53	2
54	3
55	6
56	0
57	3
58	1
59	2
60	0
61	2
62	2
63	2
64	0
65	1
66	1
67	1
68	0
69	4
70	5
71	5
72	0
73	2
74	1
75	6
76	0
77	5
78	2
79	4
80	0
81	1
82	1
83	1
84	0
85	4
86	3
87	2
88	0
89	5
90	1
91	2
92	0
93	3
94	2
95	3
96	0
97	1
98	1
99	1
100	0
101	4
102	4
103	6
104	0
105	2
106	1
107	3
108	0
109	3
110	2
111	3
112	0

n	a(n)
8	0
9	2
10	1
11	4
12	0
13	5
14	2
15	9
16	0
17	1
18	1
19	1
20	0
21	3
22	3
23	2
24	0
25	4
26	1
27	2
28	0
29	6
30	2
31	7
32	0
33	1
34	1
35	1
36	0
37	5
38	4
39	4
40	0
41	2
42	1
43	3
44	0
45	8
46	2
47	7
48	0
49	1
50	1
51	1
52	0
53	2
54	3
55	6
56	0
57	3
58	1
59	2
60	0
61	2
62	2
63	2
64	0
65	1
66	1
67	1
68	0
69	4
70	5
71	5
72	0
73	2
74	1
75	6
76	0
77	5
78	2
79	4
80	0
81	1
82	1
83	1
84	0
85	4
86	3
87	2
88	0
89	5
90	1
91	2
92	0
93	3
94	2
95	3
96	0
97	1
98	1
99	1
100	0
101	4
102	4
103	6
104	0
105	2
106	1
107	3
108	0
109	3
110	2
111	3
112	0