A157987 - cp's OEIS frontend

A157987 Smallest roots m of perfect powers (m^k where m is an integer and k >= 2) multiplied by -1 when m is prime (m^k thus a prime power).

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

[1, -2, -2, -3, -2, -5, -3, -2, 6, -7, -2, -3, 10, -11, -5, -2, 12, -13, 14, 6, 15, -3, -2, -17, 18, -7, -19, 20, 21, 22, -2, -23, 24, -5, 26, -3, 28, -29, 30, -31, 10, -2, 33, 34, 35, 6, -11, -37, 38, 39, 40, -41, 12, 42, -43, 44, 45, -2, 46, -3, -13, -47, 48, -7, 50, 51, 52]

cp's OEIS Frontend

A157987 Smallest roots m of perfect powers (m^k where m is an integer and k >= 2) multiplied by -1 when m is prime (m^k thus a prime power).

Table of values

List of values

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

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

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