A072546 - cp's OEIS frontend

A072546 Sequence related to Fibonacci and "tribonacci" sequences : let f(1)=1, f(2)=n, f(k+2)=f(k+1)+f(k), t(1)=t(2)=t(3)=1, t(k+3)=t(k+2)+t(k+1)+t(k) (t(k)=A000213(k-1)); sequence gives the smallest value k = a(n) such that t(k)>f(k).

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

[6, 9, 12, 14, 15, 16, 18, 19, 19, 20, 21, 21, 22, 23, 23, 24, 24, 25, 25, 25, 26, 26, 26, 27, 27, 27, 28, 28, 28, 28, 29, 29, 29, 29, 30, 30, 30, 30, 30, 31, 31, 31, 31, 31, 32, 32, 32, 32, 32, 32, 32, 33, 33, 33, 33, 33, 33, 33, 34, 34, 34, 34, 34, 34, 34, 34, 35, 35, 35, 35]

cp's OEIS Frontend

A072546 Sequence related to Fibonacci and "tribonacci" sequences : let f(1)=1, f(2)=n, f(k+2)=f(k+1)+f(k), t(1)=t(2)=t(3)=1, t(k+3)=t(k+2)+t(k+1)+t(k) (t(k)=A000213(k-1)); sequence gives the smallest value k = a(n) such that t(k)>f(k).

Table of values

List of values

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

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

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