A157986 - cp's OEIS frontend

A157986 Largest exponents of perfect powers (m^k where m is an integer and k >= 2) multiplied by -1 when base m is prime (m^k thus a prime power).

n	a(n)
1	2
2	-2
3	-3
4	-2
5	-4
6	-2
7	-3
8	-5
9	2
10	-2
11	-6
12	-4
13	2
14	-2
15	-3
16	-7
17	2
18	-2
19	2
20	3
21	2
22	-5
23	-8
24	-2
25	2
26	-3
27	-2
28	2
29	2
30	2
31	-9
32	-2
33	2
34	-4
35	2
36	-6
37	2
38	-2
39	2
40	-2
41	3
42	-10
43	2
44	2
45	2
46	4
47	-3
48	-2
49	2
50	2
51	2
52	-2
53	3
54	2
55	-2
56	2
57	2
58	-11
59	2
60	-7
61	-3
62	-2
63	2
64	-4
65	2
66	2
67	2
68	3
69	-2
70	2
71	2
72	-5
73	2
74	2
75	2
76	3
77	-2
78	2
79	-2
80	2
81	2
82	-12
83	2
84	2

[2, -2, -3, -2, -4, -2, -3, -5, 2, -2, -6, -4, 2, -2, -3, -7, 2, -2, 2, 3, 2, -5, -8, -2, 2, -3, -2, 2, 2, 2, -9, -2, 2, -4, 2, -6, 2, -2, 2, -2, 3, -10, 2, 2, 2, 4, -3, -2, 2, 2, 2, -2, 3, 2, -2, 2, 2, -11, 2, -7, -3, -2, 2, -4, 2, 2, 2, 3, -2, 2, 2, -5, 2, 2, 2, 3, -2, 2, -2, 2, 2, -12, 2, 2]

cp's OEIS Frontend

A157986 Largest exponents of perfect powers (m^k where m is an integer and k >= 2) multiplied by -1 when base m is prime (m^k thus a prime power).

Table of values

List of values

n	a(n)
1	2
2	-2
3	-3
4	-2
5	-4
6	-2
7	-3
8	-5
9	2
10	-2
11	-6
12	-4
13	2
14	-2
15	-3
16	-7
17	2
18	-2
19	2
20	3
21	2
22	-5
23	-8
24	-2
25	2
26	-3
27	-2
28	2
29	2
30	2
31	-9
32	-2
33	2
34	-4
35	2
36	-6
37	2
38	-2
39	2
40	-2
41	3
42	-10
43	2
44	2
45	2
46	4
47	-3
48	-2
49	2
50	2
51	2
52	-2
53	3
54	2
55	-2
56	2
57	2
58	-11
59	2
60	-7
61	-3
62	-2
63	2
64	-4
65	2
66	2
67	2
68	3
69	-2
70	2
71	2
72	-5
73	2
74	2
75	2
76	3
77	-2
78	2
79	-2
80	2
81	2
82	-12
83	2
84	2

n	a(n)
1	2
2	-2
3	-3
4	-2
5	-4
6	-2
7	-3
8	-5
9	2
10	-2
11	-6
12	-4
13	2
14	-2
15	-3
16	-7
17	2
18	-2
19	2
20	3
21	2
22	-5
23	-8
24	-2
25	2
26	-3
27	-2
28	2
29	2
30	2
31	-9
32	-2
33	2
34	-4
35	2
36	-6
37	2
38	-2
39	2
40	-2
41	3
42	-10
43	2
44	2
45	2
46	4
47	-3
48	-2
49	2
50	2
51	2
52	-2
53	3
54	2
55	-2
56	2
57	2
58	-11
59	2
60	-7
61	-3
62	-2
63	2
64	-4
65	2
66	2
67	2
68	3
69	-2
70	2
71	2
72	-5
73	2
74	2
75	2
76	3
77	-2
78	2
79	-2
80	2
81	2
82	-12
83	2
84	2

n	a(n)
1	2
2	-2
3	-3
4	-2
5	-4
6	-2
7	-3
8	-5
9	2
10	-2
11	-6
12	-4
13	2
14	-2
15	-3
16	-7
17	2
18	-2
19	2
20	3
21	2
22	-5
23	-8
24	-2
25	2
26	-3
27	-2
28	2
29	2
30	2
31	-9
32	-2
33	2
34	-4
35	2
36	-6
37	2
38	-2
39	2
40	-2
41	3
42	-10
43	2
44	2
45	2
46	4
47	-3
48	-2
49	2
50	2
51	2
52	-2
53	3
54	2
55	-2
56	2
57	2
58	-11
59	2
60	-7
61	-3
62	-2
63	2
64	-4
65	2
66	2
67	2
68	3
69	-2
70	2
71	2
72	-5
73	2
74	2
75	2
76	3
77	-2
78	2
79	-2
80	2
81	2
82	-12
83	2
84	2