A075378 - cp's OEIS frontend

A075378 Rearrangement of natural numbers with a(1) = 1, a(2n) squarefree and a(2n+1) not squarefree.

n	a(n)
1	1
2	2
3	4
4	3
5	8
6	5
7	9
8	6
9	12
10	7
11	16
12	10
13	18
14	11
15	20
16	13
17	24
18	14
19	25
20	15
21	27
22	17
23	28
24	19
25	32
26	21
27	36
28	22
29	40
30	23
31	44
32	26
33	45
34	29
35	48
36	30
37	49
38	31
39	50
40	33
41	52
42	34
43	54
44	35
45	56
46	37
47	60
48	38
49	63
50	39
51	64
52	41
53	68
54	42
55	72
56	43
57	75
58	46
59	76
60	47
61	80
62	51
63	81
64	53
65	84
66	55
67	88
68	57
69	90
70	58
71	92
72	59

[1, 2, 4, 3, 8, 5, 9, 6, 12, 7, 16, 10, 18, 11, 20, 13, 24, 14, 25, 15, 27, 17, 28, 19, 32, 21, 36, 22, 40, 23, 44, 26, 45, 29, 48, 30, 49, 31, 50, 33, 52, 34, 54, 35, 56, 37, 60, 38, 63, 39, 64, 41, 68, 42, 72, 43, 75, 46, 76, 47, 80, 51, 81, 53, 84, 55, 88, 57, 90, 58, 92, 59]

cp's OEIS Frontend

A075378 Rearrangement of natural numbers with a(1) = 1, a(2n) squarefree and a(2n+1) not squarefree.

Table of values

List of values

n	a(n)
1	1
2	2
3	4
4	3
5	8
6	5
7	9
8	6
9	12
10	7
11	16
12	10
13	18
14	11
15	20
16	13
17	24
18	14
19	25
20	15
21	27
22	17
23	28
24	19
25	32
26	21
27	36
28	22
29	40
30	23
31	44
32	26
33	45
34	29
35	48
36	30
37	49
38	31
39	50
40	33
41	52
42	34
43	54
44	35
45	56
46	37
47	60
48	38
49	63
50	39
51	64
52	41
53	68
54	42
55	72
56	43
57	75
58	46
59	76
60	47
61	80
62	51
63	81
64	53
65	84
66	55
67	88
68	57
69	90
70	58
71	92
72	59

n	a(n)
1	1
2	2
3	4
4	3
5	8
6	5
7	9
8	6
9	12
10	7
11	16
12	10
13	18
14	11
15	20
16	13
17	24
18	14
19	25
20	15
21	27
22	17
23	28
24	19
25	32
26	21
27	36
28	22
29	40
30	23
31	44
32	26
33	45
34	29
35	48
36	30
37	49
38	31
39	50
40	33
41	52
42	34
43	54
44	35
45	56
46	37
47	60
48	38
49	63
50	39
51	64
52	41
53	68
54	42
55	72
56	43
57	75
58	46
59	76
60	47
61	80
62	51
63	81
64	53
65	84
66	55
67	88
68	57
69	90
70	58
71	92
72	59

n	a(n)
1	1
2	2
3	4
4	3
5	8
6	5
7	9
8	6
9	12
10	7
11	16
12	10
13	18
14	11
15	20
16	13
17	24
18	14
19	25
20	15
21	27
22	17
23	28
24	19
25	32
26	21
27	36
28	22
29	40
30	23
31	44
32	26
33	45
34	29
35	48
36	30
37	49
38	31
39	50
40	33
41	52
42	34
43	54
44	35
45	56
46	37
47	60
48	38
49	63
50	39
51	64
52	41
53	68
54	42
55	72
56	43
57	75
58	46
59	76
60	47
61	80
62	51
63	81
64	53
65	84
66	55
67	88
68	57
69	90
70	58
71	92
72	59