A224523 - cp's OEIS frontend

A224523 Let {f_n(k)} be the n-th sequence of Fibonacci-like numbers defined by recursion f_n(0) = 0, f_n(1) = 1 and, for k>=2, f_n(k) = f_n(k-1) + f_n(k-2) divided by maximal possible powers of primes >= prime(n). a(n) is length of the smallest period of {f_n(k)}, and a(n)=0, if {f_n(k)} is not eventually periodic.

n	a(n)
1	1
2	3
3	6
4	9
5	9
6	12
7	15
8	27
9	12
10	12
11	15
12	15
13	15
14	15
15	15
16	15
17	15
18	42
19	42
20	42
21	42
22	42
23	42
24	90
25	72
26	36
27	36
28	36
29	36
30	36
31	36
32	36
33	36
34	36
35	54
36	54
37	66
38	102
39	102
40	102
41	102
42	102
43	102
44	102
45	102
46	36
47	36
48	36
49	36
50	36
51	36
52	24
53	24
54	24
55	24
56	24
57	24
58	24
59	24
60	24
61	24
62	24
63	24
64	24

[1, 3, 6, 9, 9, 12, 15, 27, 12, 12, 15, 15, 15, 15, 15, 15, 15, 42, 42, 42, 42, 42, 42, 90, 72, 36, 36, 36, 36, 36, 36, 36, 36, 36, 54, 54, 66, 102, 102, 102, 102, 102, 102, 102, 102, 36, 36, 36, 36, 36, 36, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24]

cp's OEIS Frontend

Table of values

List of values

n	a(n)
1	1
2	3
3	6
4	9
5	9
6	12
7	15
8	27
9	12
10	12
11	15
12	15
13	15
14	15
15	15
16	15
17	15
18	42
19	42
20	42
21	42
22	42
23	42
24	90
25	72
26	36
27	36
28	36
29	36
30	36
31	36
32	36
33	36
34	36
35	54
36	54
37	66
38	102
39	102
40	102
41	102
42	102
43	102
44	102
45	102
46	36
47	36
48	36
49	36
50	36
51	36
52	24
53	24
54	24
55	24
56	24
57	24
58	24
59	24
60	24
61	24
62	24
63	24
64	24

n	a(n)
1	1
2	3
3	6
4	9
5	9
6	12
7	15
8	27
9	12
10	12
11	15
12	15
13	15
14	15
15	15
16	15
17	15
18	42
19	42
20	42
21	42
22	42
23	42
24	90
25	72
26	36
27	36
28	36
29	36
30	36
31	36
32	36
33	36
34	36
35	54
36	54
37	66
38	102
39	102
40	102
41	102
42	102
43	102
44	102
45	102
46	36
47	36
48	36
49	36
50	36
51	36
52	24
53	24
54	24
55	24
56	24
57	24
58	24
59	24
60	24
61	24
62	24
63	24
64	24

n	a(n)
1	1
2	3
3	6
4	9
5	9
6	12
7	15
8	27
9	12
10	12
11	15
12	15
13	15
14	15
15	15
16	15
17	15
18	42
19	42
20	42
21	42
22	42
23	42
24	90
25	72
26	36
27	36
28	36
29	36
30	36
31	36
32	36
33	36
34	36
35	54
36	54
37	66
38	102
39	102
40	102
41	102
42	102
43	102
44	102
45	102
46	36
47	36
48	36
49	36
50	36
51	36
52	24
53	24
54	24
55	24
56	24
57	24
58	24
59	24
60	24
61	24
62	24
63	24
64	24