A049999 - cp's OEIS frontend

A049999 a(n) = smallest index k such that Fibonacci(k) = d(n), where d = A049998 (sequence of first differences of ordered products of Fibonacci numbers, i.e., of A049997, with no duplicates).

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

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

cp's OEIS Frontend

A049999 a(n) = smallest index k such that Fibonacci(k) = d(n), where d = A049998 (sequence of first differences of ordered products of Fibonacci numbers, i.e., of A049997, with no duplicates).

Table of values

List of values

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

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

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