A117205 - cp's OEIS frontend

A117205 Odd squarefree positive integers k such that (k+1)/2 is also squarefree.

n	a(n)
1	1
2	3
3	5
4	11
5	13
6	19
7	21
8	29
9	33
10	37
11	41
12	43
13	51
14	57
15	59
16	61
17	65
18	67
19	69
20	73
21	77
22	83
23	85
24	91
25	93
26	101
27	105
28	109
29	113
30	115
31	123
32	129
33	131
34	133
35	137
36	139
37	141
38	145
39	155
40	157
41	163
42	165
43	173
44	177
45	181
46	185
47	187
48	193
49	201
50	203
51	205
52	209
53	211
54	213
55	217
56	219
57	221
58	227
59	229

[1, 3, 5, 11, 13, 19, 21, 29, 33, 37, 41, 43, 51, 57, 59, 61, 65, 67, 69, 73, 77, 83, 85, 91, 93, 101, 105, 109, 113, 115, 123, 129, 131, 133, 137, 139, 141, 145, 155, 157, 163, 165, 173, 177, 181, 185, 187, 193, 201, 203, 205, 209, 211, 213, 217, 219, 221, 227, 229]

cp's OEIS Frontend

A117205 Odd squarefree positive integers k such that (k+1)/2 is also squarefree.

Table of values

List of values

n	a(n)
1	1
2	3
3	5
4	11
5	13
6	19
7	21
8	29
9	33
10	37
11	41
12	43
13	51
14	57
15	59
16	61
17	65
18	67
19	69
20	73
21	77
22	83
23	85
24	91
25	93
26	101
27	105
28	109
29	113
30	115
31	123
32	129
33	131
34	133
35	137
36	139
37	141
38	145
39	155
40	157
41	163
42	165
43	173
44	177
45	181
46	185
47	187
48	193
49	201
50	203
51	205
52	209
53	211
54	213
55	217
56	219
57	221
58	227
59	229

n	a(n)
1	1
2	3
3	5
4	11
5	13
6	19
7	21
8	29
9	33
10	37
11	41
12	43
13	51
14	57
15	59
16	61
17	65
18	67
19	69
20	73
21	77
22	83
23	85
24	91
25	93
26	101
27	105
28	109
29	113
30	115
31	123
32	129
33	131
34	133
35	137
36	139
37	141
38	145
39	155
40	157
41	163
42	165
43	173
44	177
45	181
46	185
47	187
48	193
49	201
50	203
51	205
52	209
53	211
54	213
55	217
56	219
57	221
58	227
59	229

n	a(n)
1	1
2	3
3	5
4	11
5	13
6	19
7	21
8	29
9	33
10	37
11	41
12	43
13	51
14	57
15	59
16	61
17	65
18	67
19	69
20	73
21	77
22	83
23	85
24	91
25	93
26	101
27	105
28	109
29	113
30	115
31	123
32	129
33	131
34	133
35	137
36	139
37	141
38	145
39	155
40	157
41	163
42	165
43	173
44	177
45	181
46	185
47	187
48	193
49	201
50	203
51	205
52	209
53	211
54	213
55	217
56	219
57	221
58	227
59	229