A104406 - cp's OEIS frontend

A104406 Number of numbers <= n having no 2 in ternary representation.

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

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

cp's OEIS Frontend

A104406 Number of numbers <= n having no 2 in ternary representation.

Table of values

List of values

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

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

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