A324893 - cp's OEIS frontend

A324893 a(n) = sigma(A097706(n)), where A097706(n) is the part of n composed of prime factors of form 4k+3.

n	a(n)
1	1
2	1
3	4
4	1
5	1
6	4
7	8
8	1
9	13
10	1
11	12
12	4
13	1
14	8
15	4
16	1
17	1
18	13
19	20
20	1
21	32
22	12
23	24
24	4
25	1
26	1
27	40
28	8
29	1
30	4
31	32
32	1
33	48
34	1
35	8
36	13
37	1
38	20
39	4
40	1
41	1
42	32
43	44
44	12
45	13
46	24
47	48
48	4
49	57
50	1
51	4
52	1
53	1
54	40
55	12
56	8
57	80
58	1
59	60
60	4
61	1
62	32
63	104
64	1
65	1
66	48
67	68
68	1
69	96
70	8
71	72
72	13
73	1
74	1
75	4
76	20
77	96
78	4
79	80
80	1
81	121
82	1
83	84
84	32
85	1
86	44
87	4
88	12
89	1
90	13
91	8
92	24
93	128
94	48
95	20
96	4
97	1
98	57
99	156
100	1
101	1
102	4

[1, 1, 4, 1, 1, 4, 8, 1, 13, 1, 12, 4, 1, 8, 4, 1, 1, 13, 20, 1, 32, 12, 24, 4, 1, 1, 40, 8, 1, 4, 32, 1, 48, 1, 8, 13, 1, 20, 4, 1, 1, 32, 44, 12, 13, 24, 48, 4, 57, 1, 4, 1, 1, 40, 12, 8, 80, 1, 60, 4, 1, 32, 104, 1, 1, 48, 68, 1, 96, 8, 72, 13, 1, 1, 4, 20, 96, 4, 80, 1, 121, 1, 84, 32, 1, 44, 4, 12, 1, 13, 8, 24, 128, 48, 20, 4, 1, 57, 156, 1, 1, 4]

cp's OEIS Frontend

A324893 a(n) = sigma(A097706(n)), where A097706(n) is the part of n composed of prime factors of form 4k+3.

Table of values

List of values

n	a(n)
1	1
2	1
3	4
4	1
5	1
6	4
7	8
8	1
9	13
10	1
11	12
12	4
13	1
14	8
15	4
16	1
17	1
18	13
19	20
20	1
21	32
22	12
23	24
24	4
25	1
26	1
27	40
28	8
29	1
30	4
31	32
32	1
33	48
34	1
35	8
36	13
37	1
38	20
39	4
40	1
41	1
42	32
43	44
44	12
45	13
46	24
47	48
48	4
49	57
50	1
51	4
52	1
53	1
54	40
55	12
56	8
57	80
58	1
59	60
60	4
61	1
62	32
63	104
64	1
65	1
66	48
67	68
68	1
69	96
70	8
71	72
72	13
73	1
74	1
75	4
76	20
77	96
78	4
79	80
80	1
81	121
82	1
83	84
84	32
85	1
86	44
87	4
88	12
89	1
90	13
91	8
92	24
93	128
94	48
95	20
96	4
97	1
98	57
99	156
100	1
101	1
102	4

n	a(n)
1	1
2	1
3	4
4	1
5	1
6	4
7	8
8	1
9	13
10	1
11	12
12	4
13	1
14	8
15	4
16	1
17	1
18	13
19	20
20	1
21	32
22	12
23	24
24	4
25	1
26	1
27	40
28	8
29	1
30	4
31	32
32	1
33	48
34	1
35	8
36	13
37	1
38	20
39	4
40	1
41	1
42	32
43	44
44	12
45	13
46	24
47	48
48	4
49	57
50	1
51	4
52	1
53	1
54	40
55	12
56	8
57	80
58	1
59	60
60	4
61	1
62	32
63	104
64	1
65	1
66	48
67	68
68	1
69	96
70	8
71	72
72	13
73	1
74	1
75	4
76	20
77	96
78	4
79	80
80	1
81	121
82	1
83	84
84	32
85	1
86	44
87	4
88	12
89	1
90	13
91	8
92	24
93	128
94	48
95	20
96	4
97	1
98	57
99	156
100	1
101	1
102	4

n	a(n)
1	1
2	1
3	4
4	1
5	1
6	4
7	8
8	1
9	13
10	1
11	12
12	4
13	1
14	8
15	4
16	1
17	1
18	13
19	20
20	1
21	32
22	12
23	24
24	4
25	1
26	1
27	40
28	8
29	1
30	4
31	32
32	1
33	48
34	1
35	8
36	13
37	1
38	20
39	4
40	1
41	1
42	32
43	44
44	12
45	13
46	24
47	48
48	4
49	57
50	1
51	4
52	1
53	1
54	40
55	12
56	8
57	80
58	1
59	60
60	4
61	1
62	32
63	104
64	1
65	1
66	48
67	68
68	1
69	96
70	8
71	72
72	13
73	1
74	1
75	4
76	20
77	96
78	4
79	80
80	1
81	121
82	1
83	84
84	32
85	1
86	44
87	4
88	12
89	1
90	13
91	8
92	24
93	128
94	48
95	20
96	4
97	1
98	57
99	156
100	1
101	1
102	4