A033097 - cp's OEIS frontend

A033097 Number of 2's when n is written in base b for 2<=b<=n+1.

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

[0, 1, 0, 0, 1, 2, 2, 4, 2, 4, 4, 4, 3, 7, 4, 6, 7, 7, 5, 9, 5, 9, 8, 9, 8, 14, 7, 7, 8, 9, 6, 13, 8, 12, 12, 10, 11, 16, 9, 11, 12, 16, 11, 16, 10, 14, 15, 12, 11, 20, 14, 17, 16, 15, 12, 19, 15, 19, 16, 16, 15, 25, 15, 17, 19, 19, 17, 21, 16, 19, 18]

cp's OEIS Frontend

A033097 Number of 2's when n is written in base b for 2<=b<=n+1.

Table of values

List of values

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

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

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