A007731 - cp's OEIS frontend

A007731 a(n) = a(floor(n/2)) + a(floor(n/3)) + a(floor(n/6)), with a(0) = 1.

n	a(n)
0	1
1	3
2	5
3	7
4	9
5	9
6	15
7	15
8	17
9	19
10	19
11	19
12	29
13	29
14	29
15	29
16	31
17	31
18	41
19	41
20	41
21	41
22	41
23	41
24	55
25	55
26	55
27	57
28	57
29	57
30	57
31	57
32	59
33	59
34	59
35	59
36	85
37	85
38	85
39	85
40	85
41	85
42	85
43	85
44	85
45	85
46	85
47	85
48	103
49	103
50	103
51	103
52	103
53	103
54	117
55	117

[1, 3, 5, 7, 9, 9, 15, 15, 17, 19, 19, 19, 29, 29, 29, 29, 31, 31, 41, 41, 41, 41, 41, 41, 55, 55, 55, 57, 57, 57, 57, 57, 59, 59, 59, 59, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 103, 103, 103, 103, 103, 103, 117, 117]

cp's OEIS Frontend

A007731 a(n) = a(floor(n/2)) + a(floor(n/3)) + a(floor(n/6)), with a(0) = 1.

Table of values

List of values

n	a(n)
0	1
1	3
2	5
3	7
4	9
5	9
6	15
7	15
8	17
9	19
10	19
11	19
12	29
13	29
14	29
15	29
16	31
17	31
18	41
19	41
20	41
21	41
22	41
23	41
24	55
25	55
26	55
27	57
28	57
29	57
30	57
31	57
32	59
33	59
34	59
35	59
36	85
37	85
38	85
39	85
40	85
41	85
42	85
43	85
44	85
45	85
46	85
47	85
48	103
49	103
50	103
51	103
52	103
53	103
54	117
55	117

n	a(n)
0	1
1	3
2	5
3	7
4	9
5	9
6	15
7	15
8	17
9	19
10	19
11	19
12	29
13	29
14	29
15	29
16	31
17	31
18	41
19	41
20	41
21	41
22	41
23	41
24	55
25	55
26	55
27	57
28	57
29	57
30	57
31	57
32	59
33	59
34	59
35	59
36	85
37	85
38	85
39	85
40	85
41	85
42	85
43	85
44	85
45	85
46	85
47	85
48	103
49	103
50	103
51	103
52	103
53	103
54	117
55	117

n	a(n)
0	1
1	3
2	5
3	7
4	9
5	9
6	15
7	15
8	17
9	19
10	19
11	19
12	29
13	29
14	29
15	29
16	31
17	31
18	41
19	41
20	41
21	41
22	41
23	41
24	55
25	55
26	55
27	57
28	57
29	57
30	57
31	57
32	59
33	59
34	59
35	59
36	85
37	85
38	85
39	85
40	85
41	85
42	85
43	85
44	85
45	85
46	85
47	85
48	103
49	103
50	103
51	103
52	103
53	103
54	117
55	117