A336018 - cp's OEIS frontend

A336018 a(n) = floor(frac(log_2(n))*n), where frac denotes the fractional part.

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

[0, 0, 1, 0, 1, 3, 5, 0, 1, 3, 5, 7, 9, 11, 13, 0, 1, 3, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 27, 29, 0, 1, 2, 4, 6, 7, 9, 11, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 45, 47, 49, 52, 54, 56, 59, 61, 0, 1, 2, 4, 5, 7, 9, 10, 12, 13]

cp's OEIS Frontend

A336018 a(n) = floor(frac(log_2(n))*n), where frac denotes the fractional part.

Table of values

List of values

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

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

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