A324892 - cp's OEIS frontend

A324892 Multiplicative with a(p^e) = p^e if sigma(p^e) is prime, and 1 otherwise.

n	a(n)
1	1
2	2
3	1
4	4
5	1
6	2
7	1
8	1
9	9
10	2
11	1
12	4
13	1
14	2
15	1
16	16
17	1
18	18
19	1
20	4
21	1
22	2
23	1
24	1
25	25
26	2
27	1
28	4
29	1
30	2
31	1
32	1
33	1
34	2
35	1
36	36
37	1
38	2
39	1
40	1
41	1
42	2
43	1
44	4
45	9
46	2
47	1
48	16
49	1
50	50
51	1
52	4
53	1
54	2
55	1
56	1
57	1
58	2
59	1
60	4
61	1
62	2
63	9
64	64
65	1
66	2
67	1
68	4
69	1
70	2
71	1
72	9
73	1
74	2
75	25
76	4
77	1
78	2
79	1
80	16
81	1
82	2
83	1
84	4
85	1
86	2
87	1
88	1
89	1
90	18
91	1
92	4
93	1
94	2
95	1
96	1
97	1
98	2
99	9
100	100
101	1
102	2
103	1
104	1
105	1

[1, 2, 1, 4, 1, 2, 1, 1, 9, 2, 1, 4, 1, 2, 1, 16, 1, 18, 1, 4, 1, 2, 1, 1, 25, 2, 1, 4, 1, 2, 1, 1, 1, 2, 1, 36, 1, 2, 1, 1, 1, 2, 1, 4, 9, 2, 1, 16, 1, 50, 1, 4, 1, 2, 1, 1, 1, 2, 1, 4, 1, 2, 9, 64, 1, 2, 1, 4, 1, 2, 1, 9, 1, 2, 25, 4, 1, 2, 1, 16, 1, 2, 1, 4, 1, 2, 1, 1, 1, 18, 1, 4, 1, 2, 1, 1, 1, 2, 9, 100, 1, 2, 1, 1, 1]

cp's OEIS Frontend

A324892 Multiplicative with a(p^e) = p^e if sigma(p^e) is prime, and 1 otherwise.

Table of values

List of values

n	a(n)
1	1
2	2
3	1
4	4
5	1
6	2
7	1
8	1
9	9
10	2
11	1
12	4
13	1
14	2
15	1
16	16
17	1
18	18
19	1
20	4
21	1
22	2
23	1
24	1
25	25
26	2
27	1
28	4
29	1
30	2
31	1
32	1
33	1
34	2
35	1
36	36
37	1
38	2
39	1
40	1
41	1
42	2
43	1
44	4
45	9
46	2
47	1
48	16
49	1
50	50
51	1
52	4
53	1
54	2
55	1
56	1
57	1
58	2
59	1
60	4
61	1
62	2
63	9
64	64
65	1
66	2
67	1
68	4
69	1
70	2
71	1
72	9
73	1
74	2
75	25
76	4
77	1
78	2
79	1
80	16
81	1
82	2
83	1
84	4
85	1
86	2
87	1
88	1
89	1
90	18
91	1
92	4
93	1
94	2
95	1
96	1
97	1
98	2
99	9
100	100
101	1
102	2
103	1
104	1
105	1

n	a(n)
1	1
2	2
3	1
4	4
5	1
6	2
7	1
8	1
9	9
10	2
11	1
12	4
13	1
14	2
15	1
16	16
17	1
18	18
19	1
20	4
21	1
22	2
23	1
24	1
25	25
26	2
27	1
28	4
29	1
30	2
31	1
32	1
33	1
34	2
35	1
36	36
37	1
38	2
39	1
40	1
41	1
42	2
43	1
44	4
45	9
46	2
47	1
48	16
49	1
50	50
51	1
52	4
53	1
54	2
55	1
56	1
57	1
58	2
59	1
60	4
61	1
62	2
63	9
64	64
65	1
66	2
67	1
68	4
69	1
70	2
71	1
72	9
73	1
74	2
75	25
76	4
77	1
78	2
79	1
80	16
81	1
82	2
83	1
84	4
85	1
86	2
87	1
88	1
89	1
90	18
91	1
92	4
93	1
94	2
95	1
96	1
97	1
98	2
99	9
100	100
101	1
102	2
103	1
104	1
105	1

n	a(n)
1	1
2	2
3	1
4	4
5	1
6	2
7	1
8	1
9	9
10	2
11	1
12	4
13	1
14	2
15	1
16	16
17	1
18	18
19	1
20	4
21	1
22	2
23	1
24	1
25	25
26	2
27	1
28	4
29	1
30	2
31	1
32	1
33	1
34	2
35	1
36	36
37	1
38	2
39	1
40	1
41	1
42	2
43	1
44	4
45	9
46	2
47	1
48	16
49	1
50	50
51	1
52	4
53	1
54	2
55	1
56	1
57	1
58	2
59	1
60	4
61	1
62	2
63	9
64	64
65	1
66	2
67	1
68	4
69	1
70	2
71	1
72	9
73	1
74	2
75	25
76	4
77	1
78	2
79	1
80	16
81	1
82	2
83	1
84	4
85	1
86	2
87	1
88	1
89	1
90	18
91	1
92	4
93	1
94	2
95	1
96	1
97	1
98	2
99	9
100	100
101	1
102	2
103	1
104	1
105	1