A192543 - cp's OEIS frontend

A192543 Let r be the largest real zero of x^n - x^(n-1) - x^(n-2) - ... - 1 = 0. Then a(n) is the value of k which satisfies the equation 0.5/10^k < 2 - r < 5/10^k.

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

[0, 1, 1, 1, 2, 2, 2, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 9, 9, 9, 10, 10, 10, 10, 11, 11, 11, 12, 12, 12, 13, 13, 13, 13, 14, 14, 14, 15, 15, 15, 16, 16, 16, 16, 17, 17, 17, 18, 18, 18, 19, 19, 19, 19, 20, 20, 20, 21, 21, 21, 22, 22, 22]

cp's OEIS Frontend

A192543 Let r be the largest real zero of x^n - x^(n-1) - x^(n-2) - ... - 1 = 0. Then a(n) is the value of k which satisfies the equation 0.5/10^k < 2 - r < 5/10^k.

Table of values

List of values

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

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

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