A033102 - cp's OEIS frontend

A033102 Number of 4's when k is written in base b for all b and k satisfying 2<=b<=n+1, 1<=k<=n.

n	a(n)
1	0
2	0
3	0
4	1
5	1
6	1
7	1
8	1
9	2
10	3
11	4
12	5
13	6
14	8
15	9
16	11
17	12
18	14
19	16
20	19
21	21
22	25
23	27
24	32
25	35
26	38
27	40
28	46
29	50
30	53
31	56
32	61
33	64
34	71
35	73
36	78
37	82
38	86
39	91
40	98
41	101
42	105
43	109
44	117
45	121
46	129
47	133
48	140
49	148
50	152
51	155
52	164
53	169
54	176
55	180
56	186
57	190
58	198
59	204

[0, 0, 0, 1, 1, 1, 1, 1, 2, 3, 4, 5, 6, 8, 9, 11, 12, 14, 16, 19, 21, 25, 27, 32, 35, 38, 40, 46, 50, 53, 56, 61, 64, 71, 73, 78, 82, 86, 91, 98, 101, 105, 109, 117, 121, 129, 133, 140, 148, 152, 155, 164, 169, 176, 180, 186, 190, 198, 204]

cp's OEIS Frontend

A033102 Number of 4's when k is written in base b for all b and k satisfying 2<=b<=n+1, 1<=k<=n.

Table of values

List of values

n	a(n)
1	0
2	0
3	0
4	1
5	1
6	1
7	1
8	1
9	2
10	3
11	4
12	5
13	6
14	8
15	9
16	11
17	12
18	14
19	16
20	19
21	21
22	25
23	27
24	32
25	35
26	38
27	40
28	46
29	50
30	53
31	56
32	61
33	64
34	71
35	73
36	78
37	82
38	86
39	91
40	98
41	101
42	105
43	109
44	117
45	121
46	129
47	133
48	140
49	148
50	152
51	155
52	164
53	169
54	176
55	180
56	186
57	190
58	198
59	204

n	a(n)
1	0
2	0
3	0
4	1
5	1
6	1
7	1
8	1
9	2
10	3
11	4
12	5
13	6
14	8
15	9
16	11
17	12
18	14
19	16
20	19
21	21
22	25
23	27
24	32
25	35
26	38
27	40
28	46
29	50
30	53
31	56
32	61
33	64
34	71
35	73
36	78
37	82
38	86
39	91
40	98
41	101
42	105
43	109
44	117
45	121
46	129
47	133
48	140
49	148
50	152
51	155
52	164
53	169
54	176
55	180
56	186
57	190
58	198
59	204

n	a(n)
1	0
2	0
3	0
4	1
5	1
6	1
7	1
8	1
9	2
10	3
11	4
12	5
13	6
14	8
15	9
16	11
17	12
18	14
19	16
20	19
21	21
22	25
23	27
24	32
25	35
26	38
27	40
28	46
29	50
30	53
31	56
32	61
33	64
34	71
35	73
36	78
37	82
38	86
39	91
40	98
41	101
42	105
43	109
44	117
45	121
46	129
47	133
48	140
49	148
50	152
51	155
52	164
53	169
54	176
55	180
56	186
57	190
58	198
59	204