A188047 - cp's OEIS frontend

A188047 Numbers k such that k^k-1 and k^k+1 are squarefree.

n	a(n)
1	2
2	4
3	6
4	12
5	16
6	20
7	22
8	34
9	36
10	42
11	52
12	56
13	58
14	60
15	66
16	72
17	78
18	84
19	86
20	88
21	90
22	92
23	94
24	96
25	102
26	104
27	106
28	108
29	110
30	112
31	114
32	128
33	138
34	140
35	142
36	144
37	156
38	158

[2, 4, 6, 12, 16, 20, 22, 34, 36, 42, 52, 56, 58, 60, 66, 72, 78, 84, 86, 88, 90, 92, 94, 96, 102, 104, 106, 108, 110, 112, 114, 128, 138, 140, 142, 144, 156, 158]

cp's OEIS Frontend

A188047 Numbers k such that k^k-1 and k^k+1 are squarefree.

Table of values

List of values

n	a(n)
1	2
2	4
3	6
4	12
5	16
6	20
7	22
8	34
9	36
10	42
11	52
12	56
13	58
14	60
15	66
16	72
17	78
18	84
19	86
20	88
21	90
22	92
23	94
24	96
25	102
26	104
27	106
28	108
29	110
30	112
31	114
32	128
33	138
34	140
35	142
36	144
37	156
38	158

n	a(n)
1	2
2	4
3	6
4	12
5	16
6	20
7	22
8	34
9	36
10	42
11	52
12	56
13	58
14	60
15	66
16	72
17	78
18	84
19	86
20	88
21	90
22	92
23	94
24	96
25	102
26	104
27	106
28	108
29	110
30	112
31	114
32	128
33	138
34	140
35	142
36	144
37	156
38	158

n	a(n)
1	2
2	4
3	6
4	12
5	16
6	20
7	22
8	34
9	36
10	42
11	52
12	56
13	58
14	60
15	66
16	72
17	78
18	84
19	86
20	88
21	90
22	92
23	94
24	96
25	102
26	104
27	106
28	108
29	110
30	112
31	114
32	128
33	138
34	140
35	142
36	144
37	156
38	158