A033107 - cp's OEIS frontend

A033107 Number of 7's when n is written in base b for 2<=b<=n+1.

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	0
7	1
8	0
9	0
10	0
11	0
12	0
13	0
14	0
15	1
16	1
17	1
18	1
19	1
20	1
21	1
22	1
23	2
24	1
25	2
26	1
27	2
28	1
29	2
30	1
31	3
32	1
33	2
34	2
35	2
36	1
37	3
38	1
39	3
40	2
41	2
42	1
43	4
44	1
45	2
46	2
47	4
48	1
49	3
50	1
51	3
52	3
53	2
54	1
55	5
56	2
57	4
58	3
59	4
60	2
61	5
62	3
63	6
64	3
65	3
66	2
67	7
68	2
69	3
70	5
71	6
72	3
73	5
74	2
75	4
76	3
77	6
78	3
79	9
80	2
81	3
82	4
83	4
84	4
85	6
86	3
87	8
88	4
89	3
90	2

[0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 2, 1, 2, 1, 2, 1, 3, 1, 2, 2, 2, 1, 3, 1, 3, 2, 2, 1, 4, 1, 2, 2, 4, 1, 3, 1, 3, 3, 2, 1, 5, 2, 4, 3, 4, 2, 5, 3, 6, 3, 3, 2, 7, 2, 3, 5, 6, 3, 5, 2, 4, 3, 6, 3, 9, 2, 3, 4, 4, 4, 6, 3, 8, 4, 3, 2]

cp's OEIS Frontend

A033107 Number of 7'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	0
3	0
4	0
5	0
6	0
7	1
8	0
9	0
10	0
11	0
12	0
13	0
14	0
15	1
16	1
17	1
18	1
19	1
20	1
21	1
22	1
23	2
24	1
25	2
26	1
27	2
28	1
29	2
30	1
31	3
32	1
33	2
34	2
35	2
36	1
37	3
38	1
39	3
40	2
41	2
42	1
43	4
44	1
45	2
46	2
47	4
48	1
49	3
50	1
51	3
52	3
53	2
54	1
55	5
56	2
57	4
58	3
59	4
60	2
61	5
62	3
63	6
64	3
65	3
66	2
67	7
68	2
69	3
70	5
71	6
72	3
73	5
74	2
75	4
76	3
77	6
78	3
79	9
80	2
81	3
82	4
83	4
84	4
85	6
86	3
87	8
88	4
89	3
90	2

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	0
7	1
8	0
9	0
10	0
11	0
12	0
13	0
14	0
15	1
16	1
17	1
18	1
19	1
20	1
21	1
22	1
23	2
24	1
25	2
26	1
27	2
28	1
29	2
30	1
31	3
32	1
33	2
34	2
35	2
36	1
37	3
38	1
39	3
40	2
41	2
42	1
43	4
44	1
45	2
46	2
47	4
48	1
49	3
50	1
51	3
52	3
53	2
54	1
55	5
56	2
57	4
58	3
59	4
60	2
61	5
62	3
63	6
64	3
65	3
66	2
67	7
68	2
69	3
70	5
71	6
72	3
73	5
74	2
75	4
76	3
77	6
78	3
79	9
80	2
81	3
82	4
83	4
84	4
85	6
86	3
87	8
88	4
89	3
90	2

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	0
7	1
8	0
9	0
10	0
11	0
12	0
13	0
14	0
15	1
16	1
17	1
18	1
19	1
20	1
21	1
22	1
23	2
24	1
25	2
26	1
27	2
28	1
29	2
30	1
31	3
32	1
33	2
34	2
35	2
36	1
37	3
38	1
39	3
40	2
41	2
42	1
43	4
44	1
45	2
46	2
47	4
48	1
49	3
50	1
51	3
52	3
53	2
54	1
55	5
56	2
57	4
58	3
59	4
60	2
61	5
62	3
63	6
64	3
65	3
66	2
67	7
68	2
69	3
70	5
71	6
72	3
73	5
74	2
75	4
76	3
77	6
78	3
79	9
80	2
81	3
82	4
83	4
84	4
85	6
86	3
87	8
88	4
89	3
90	2