A259178 - cp's OEIS frontend

A259178 Numbers k such that (4^k - 1)/3 is squarefree.

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	11
10	12
11	13
12	14
13	15
14	16
15	17
16	19
17	22
18	23
19	24
20	25
21	26
22	28
23	29
24	31
25	32
26	33
27	34
28	35
29	37
30	38
31	39
32	41
33	43
34	44
35	46
36	47
37	48
38	49
39	51
40	52
41	53
42	56
43	57
44	58
45	59
46	61
47	62
48	64
49	65
50	66
51	67
52	69
53	71
54	73
55	74
56	75
57	76
58	77
59	79
60	82
61	83
62	85
63	86
64	87
65	88
66	89
67	91
68	92
69	93
70	94
71	95
72	96
73	97
74	98
75	101
76	102
77	103
78	104
79	106
80	107
81	109
82	111

[1, 2, 3, 4, 5, 6, 7, 8, 11, 12, 13, 14, 15, 16, 17, 19, 22, 23, 24, 25, 26, 28, 29, 31, 32, 33, 34, 35, 37, 38, 39, 41, 43, 44, 46, 47, 48, 49, 51, 52, 53, 56, 57, 58, 59, 61, 62, 64, 65, 66, 67, 69, 71, 73, 74, 75, 76, 77, 79, 82, 83, 85, 86, 87, 88, 89, 91, 92, 93, 94, 95, 96, 97, 98, 101, 102, 103, 104, 106, 107, 109, 111]

cp's OEIS Frontend

A259178 Numbers k such that (4^k - 1)/3 is squarefree.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	11
10	12
11	13
12	14
13	15
14	16
15	17
16	19
17	22
18	23
19	24
20	25
21	26
22	28
23	29
24	31
25	32
26	33
27	34
28	35
29	37
30	38
31	39
32	41
33	43
34	44
35	46
36	47
37	48
38	49
39	51
40	52
41	53
42	56
43	57
44	58
45	59
46	61
47	62
48	64
49	65
50	66
51	67
52	69
53	71
54	73
55	74
56	75
57	76
58	77
59	79
60	82
61	83
62	85
63	86
64	87
65	88
66	89
67	91
68	92
69	93
70	94
71	95
72	96
73	97
74	98
75	101
76	102
77	103
78	104
79	106
80	107
81	109
82	111

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	11
10	12
11	13
12	14
13	15
14	16
15	17
16	19
17	22
18	23
19	24
20	25
21	26
22	28
23	29
24	31
25	32
26	33
27	34
28	35
29	37
30	38
31	39
32	41
33	43
34	44
35	46
36	47
37	48
38	49
39	51
40	52
41	53
42	56
43	57
44	58
45	59
46	61
47	62
48	64
49	65
50	66
51	67
52	69
53	71
54	73
55	74
56	75
57	76
58	77
59	79
60	82
61	83
62	85
63	86
64	87
65	88
66	89
67	91
68	92
69	93
70	94
71	95
72	96
73	97
74	98
75	101
76	102
77	103
78	104
79	106
80	107
81	109
82	111

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	11
10	12
11	13
12	14
13	15
14	16
15	17
16	19
17	22
18	23
19	24
20	25
21	26
22	28
23	29
24	31
25	32
26	33
27	34
28	35
29	37
30	38
31	39
32	41
33	43
34	44
35	46
36	47
37	48
38	49
39	51
40	52
41	53
42	56
43	57
44	58
45	59
46	61
47	62
48	64
49	65
50	66
51	67
52	69
53	71
54	73
55	74
56	75
57	76
58	77
59	79
60	82
61	83
62	85
63	86
64	87
65	88
66	89
67	91
68	92
69	93
70	94
71	95
72	96
73	97
74	98
75	101
76	102
77	103
78	104
79	106
80	107
81	109
82	111