A324891 - cp's OEIS frontend

A324891 a(n) = sigma(A170818(n)), where A170818(n) is the part of n composed of prime factors of form 4k+1.

n	a(n)
1	1
2	1
3	1
4	1
5	6
6	1
7	1
8	1
9	1
10	6
11	1
12	1
13	14
14	1
15	6
16	1
17	18
18	1
19	1
20	6
21	1
22	1
23	1
24	1
25	31
26	14
27	1
28	1
29	30
30	6
31	1
32	1
33	1
34	18
35	6
36	1
37	38
38	1
39	14
40	6
41	42
42	1
43	1
44	1
45	6
46	1
47	1
48	1
49	1
50	31
51	18
52	14
53	54
54	1
55	6
56	1
57	1
58	30
59	1
60	6
61	62
62	1
63	1
64	1
65	84
66	1
67	1
68	18
69	1
70	6
71	1
72	1
73	74
74	38
75	31
76	1
77	1
78	14
79	1
80	6
81	1
82	42
83	1
84	1
85	108
86	1
87	30
88	1
89	90
90	6
91	14
92	1
93	1
94	1
95	6
96	1
97	98
98	1
99	1
100	31
101	102
102	18
103	1
104	14
105	6

[1, 1, 1, 1, 6, 1, 1, 1, 1, 6, 1, 1, 14, 1, 6, 1, 18, 1, 1, 6, 1, 1, 1, 1, 31, 14, 1, 1, 30, 6, 1, 1, 1, 18, 6, 1, 38, 1, 14, 6, 42, 1, 1, 1, 6, 1, 1, 1, 1, 31, 18, 14, 54, 1, 6, 1, 1, 30, 1, 6, 62, 1, 1, 1, 84, 1, 1, 18, 1, 6, 1, 1, 74, 38, 31, 1, 1, 14, 1, 6, 1, 42, 1, 1, 108, 1, 30, 1, 90, 6, 14, 1, 1, 1, 6, 1, 98, 1, 1, 31, 102, 18, 1, 14, 6]

cp's OEIS Frontend

A324891 a(n) = sigma(A170818(n)), where A170818(n) is the part of n composed of prime factors of form 4k+1.

Table of values

List of values

n	a(n)
1	1
2	1
3	1
4	1
5	6
6	1
7	1
8	1
9	1
10	6
11	1
12	1
13	14
14	1
15	6
16	1
17	18
18	1
19	1
20	6
21	1
22	1
23	1
24	1
25	31
26	14
27	1
28	1
29	30
30	6
31	1
32	1
33	1
34	18
35	6
36	1
37	38
38	1
39	14
40	6
41	42
42	1
43	1
44	1
45	6
46	1
47	1
48	1
49	1
50	31
51	18
52	14
53	54
54	1
55	6
56	1
57	1
58	30
59	1
60	6
61	62
62	1
63	1
64	1
65	84
66	1
67	1
68	18
69	1
70	6
71	1
72	1
73	74
74	38
75	31
76	1
77	1
78	14
79	1
80	6
81	1
82	42
83	1
84	1
85	108
86	1
87	30
88	1
89	90
90	6
91	14
92	1
93	1
94	1
95	6
96	1
97	98
98	1
99	1
100	31
101	102
102	18
103	1
104	14
105	6

n	a(n)
1	1
2	1
3	1
4	1
5	6
6	1
7	1
8	1
9	1
10	6
11	1
12	1
13	14
14	1
15	6
16	1
17	18
18	1
19	1
20	6
21	1
22	1
23	1
24	1
25	31
26	14
27	1
28	1
29	30
30	6
31	1
32	1
33	1
34	18
35	6
36	1
37	38
38	1
39	14
40	6
41	42
42	1
43	1
44	1
45	6
46	1
47	1
48	1
49	1
50	31
51	18
52	14
53	54
54	1
55	6
56	1
57	1
58	30
59	1
60	6
61	62
62	1
63	1
64	1
65	84
66	1
67	1
68	18
69	1
70	6
71	1
72	1
73	74
74	38
75	31
76	1
77	1
78	14
79	1
80	6
81	1
82	42
83	1
84	1
85	108
86	1
87	30
88	1
89	90
90	6
91	14
92	1
93	1
94	1
95	6
96	1
97	98
98	1
99	1
100	31
101	102
102	18
103	1
104	14
105	6

n	a(n)
1	1
2	1
3	1
4	1
5	6
6	1
7	1
8	1
9	1
10	6
11	1
12	1
13	14
14	1
15	6
16	1
17	18
18	1
19	1
20	6
21	1
22	1
23	1
24	1
25	31
26	14
27	1
28	1
29	30
30	6
31	1
32	1
33	1
34	18
35	6
36	1
37	38
38	1
39	14
40	6
41	42
42	1
43	1
44	1
45	6
46	1
47	1
48	1
49	1
50	31
51	18
52	14
53	54
54	1
55	6
56	1
57	1
58	30
59	1
60	6
61	62
62	1
63	1
64	1
65	84
66	1
67	1
68	18
69	1
70	6
71	1
72	1
73	74
74	38
75	31
76	1
77	1
78	14
79	1
80	6
81	1
82	42
83	1
84	1
85	108
86	1
87	30
88	1
89	90
90	6
91	14
92	1
93	1
94	1
95	6
96	1
97	98
98	1
99	1
100	31
101	102
102	18
103	1
104	14
105	6