A225668 - cp's OEIS frontend

A225668 a(n) = floor(4*log_2(n)).

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

[0, 4, 6, 8, 9, 10, 11, 12, 12, 13, 13, 14, 14, 15, 15, 16, 16, 16, 16, 17, 17, 17, 18, 18, 18, 18, 19, 19, 19, 19, 19, 20, 20, 20, 20, 20, 20, 20, 21, 21, 21, 21, 21, 21, 21, 22, 22, 22, 22, 22, 22, 22, 22, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 24]

cp's OEIS Frontend

A225668 a(n) = floor(4*log_2(n)).

Table of values

List of values

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

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

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