A087669 - cp's OEIS frontend

A087669 The smallest index m such that b(m) is an integer, where b(0)=(2n+1)/n and b(k+1)=b(k)*floor(b(k)) for k>=0.

n	a(n)
1	0
2	1
3	3
4	2
5	5
6	4
7	5
8	2
9	4
10	9
11	19
12	7
13	16
14	7
15	8
16	3
17	27
18	9
19	5
20	25
21	10
22	11
23	32
24	4
25	13
26	4
27	17
28	6
29	17
30	6
31	78
32	3
33	23
34	47
35	13
36	6
37	4
38	6
39	27
40	9
41	20
42	6
43	4
44	17
45	9
46	28
47	106
48	4
49	24
50	28
51	37
52	20
53	27
54	10
55	12
56	13
57	7
58	83
59	108
60	10
61	16
62	9
63	6
64	3
65	10
66	11
67	15
68	8
69	11
70	6
71	156
72	15
73	38
74	46
75	7

[0, 1, 3, 2, 5, 4, 5, 2, 4, 9, 19, 7, 16, 7, 8, 3, 27, 9, 5, 25, 10, 11, 32, 4, 13, 4, 17, 6, 17, 6, 78, 3, 23, 47, 13, 6, 4, 6, 27, 9, 20, 6, 4, 17, 9, 28, 106, 4, 24, 28, 37, 20, 27, 10, 12, 13, 7, 83, 108, 10, 16, 9, 6, 3, 10, 11, 15, 8, 11, 6, 156, 15, 38, 46, 7]

cp's OEIS Frontend

A087669 The smallest index m such that b(m) is an integer, where b(0)=(2n+1)/n and b(k+1)=b(k)*floor(b(k)) for k>=0.

Table of values

List of values

n	a(n)
1	0
2	1
3	3
4	2
5	5
6	4
7	5
8	2
9	4
10	9
11	19
12	7
13	16
14	7
15	8
16	3
17	27
18	9
19	5
20	25
21	10
22	11
23	32
24	4
25	13
26	4
27	17
28	6
29	17
30	6
31	78
32	3
33	23
34	47
35	13
36	6
37	4
38	6
39	27
40	9
41	20
42	6
43	4
44	17
45	9
46	28
47	106
48	4
49	24
50	28
51	37
52	20
53	27
54	10
55	12
56	13
57	7
58	83
59	108
60	10
61	16
62	9
63	6
64	3
65	10
66	11
67	15
68	8
69	11
70	6
71	156
72	15
73	38
74	46
75	7

n	a(n)
1	0
2	1
3	3
4	2
5	5
6	4
7	5
8	2
9	4
10	9
11	19
12	7
13	16
14	7
15	8
16	3
17	27
18	9
19	5
20	25
21	10
22	11
23	32
24	4
25	13
26	4
27	17
28	6
29	17
30	6
31	78
32	3
33	23
34	47
35	13
36	6
37	4
38	6
39	27
40	9
41	20
42	6
43	4
44	17
45	9
46	28
47	106
48	4
49	24
50	28
51	37
52	20
53	27
54	10
55	12
56	13
57	7
58	83
59	108
60	10
61	16
62	9
63	6
64	3
65	10
66	11
67	15
68	8
69	11
70	6
71	156
72	15
73	38
74	46
75	7

n	a(n)
1	0
2	1
3	3
4	2
5	5
6	4
7	5
8	2
9	4
10	9
11	19
12	7
13	16
14	7
15	8
16	3
17	27
18	9
19	5
20	25
21	10
22	11
23	32
24	4
25	13
26	4
27	17
28	6
29	17
30	6
31	78
32	3
33	23
34	47
35	13
36	6
37	4
38	6
39	27
40	9
41	20
42	6
43	4
44	17
45	9
46	28
47	106
48	4
49	24
50	28
51	37
52	20
53	27
54	10
55	12
56	13
57	7
58	83
59	108
60	10
61	16
62	9
63	6
64	3
65	10
66	11
67	15
68	8
69	11
70	6
71	156
72	15
73	38
74	46
75	7