A265157 - cp's OEIS frontend

A265157 Number of 2's in the base-3 representation of 2^n - 1.

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

[0, 0, 0, 1, 1, 0, 1, 1, 0, 3, 2, 3, 3, 2, 2, 5, 5, 4, 3, 6, 4, 6, 5, 3, 1, 4, 2, 7, 8, 6, 9, 8, 8, 6, 7, 7, 4, 5, 8, 8, 11, 10, 7, 10, 10, 7, 9, 7, 8, 9, 11, 15, 13, 9, 9, 11, 13, 15, 12, 12, 15, 14, 11, 14, 16, 13, 14, 11, 14, 14, 14, 15]

cp's OEIS Frontend

A265157 Number of 2's in the base-3 representation of 2^n - 1.

Table of values

List of values

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

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

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