A214682 - cp's OEIS frontend

A214682 Remove 2's that do not contribute to a factor of 4 from the prime factorization of n.

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

[1, 1, 3, 4, 5, 3, 7, 4, 9, 5, 11, 12, 13, 7, 15, 16, 17, 9, 19, 20, 21, 11, 23, 12, 25, 13, 27, 28, 29, 15, 31, 16, 33, 17, 35, 36, 37, 19, 39, 20, 41, 21, 43, 44, 45, 23, 47, 48, 49, 25, 51, 52, 53, 27, 55, 28, 57, 29]

cp's OEIS Frontend

A214682 Remove 2's that do not contribute to a factor of 4 from the prime factorization of n.

Table of values

List of values

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

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

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