A354103 - cp's OEIS frontend

A354103 a(n) = sigma(A267099(n)), where A267099 is fully multiplicative involution swapping the positions of 4k+1 and 4k+3 primes, and sigma is the sum of divisors function.

n	a(n)
1	1
2	3
3	6
4	7
5	4
6	18
7	14
8	15
9	31
10	12
11	18
12	42
13	8
14	42
15	24
16	31
17	12
18	93
19	30
20	28
21	84
22	54
23	38
24	90
25	13
26	24
27	156
28	98
29	20
30	72
31	42
32	63
33	108
34	36
35	56
36	217
37	24
38	90
39	48
40	60
41	32
42	252
43	54
44	126
45	124
46	114
47	62
48	186
49	183
50	39
51	72
52	56
53	44
54	468
55	72
56	210
57	180
58	60
59	74
60	168
61	48
62	126
63	434
64	127
65	32
66	324
67	90
68	84
69	228
70	168
71	98
72	465
73	60
74	72
75	78
76	210

[1, 3, 6, 7, 4, 18, 14, 15, 31, 12, 18, 42, 8, 42, 24, 31, 12, 93, 30, 28, 84, 54, 38, 90, 13, 24, 156, 98, 20, 72, 42, 63, 108, 36, 56, 217, 24, 90, 48, 60, 32, 252, 54, 126, 124, 114, 62, 186, 183, 39, 72, 56, 44, 468, 72, 210, 180, 60, 74, 168, 48, 126, 434, 127, 32, 324, 90, 84, 228, 168, 98, 465, 60, 72, 78, 210]

cp's OEIS Frontend

A354103 a(n) = sigma(A267099(n)), where A267099 is fully multiplicative involution swapping the positions of 4k+1 and 4k+3 primes, and sigma is the sum of divisors function.

Table of values

List of values

n	a(n)
1	1
2	3
3	6
4	7
5	4
6	18
7	14
8	15
9	31
10	12
11	18
12	42
13	8
14	42
15	24
16	31
17	12
18	93
19	30
20	28
21	84
22	54
23	38
24	90
25	13
26	24
27	156
28	98
29	20
30	72
31	42
32	63
33	108
34	36
35	56
36	217
37	24
38	90
39	48
40	60
41	32
42	252
43	54
44	126
45	124
46	114
47	62
48	186
49	183
50	39
51	72
52	56
53	44
54	468
55	72
56	210
57	180
58	60
59	74
60	168
61	48
62	126
63	434
64	127
65	32
66	324
67	90
68	84
69	228
70	168
71	98
72	465
73	60
74	72
75	78
76	210

n	a(n)
1	1
2	3
3	6
4	7
5	4
6	18
7	14
8	15
9	31
10	12
11	18
12	42
13	8
14	42
15	24
16	31
17	12
18	93
19	30
20	28
21	84
22	54
23	38
24	90
25	13
26	24
27	156
28	98
29	20
30	72
31	42
32	63
33	108
34	36
35	56
36	217
37	24
38	90
39	48
40	60
41	32
42	252
43	54
44	126
45	124
46	114
47	62
48	186
49	183
50	39
51	72
52	56
53	44
54	468
55	72
56	210
57	180
58	60
59	74
60	168
61	48
62	126
63	434
64	127
65	32
66	324
67	90
68	84
69	228
70	168
71	98
72	465
73	60
74	72
75	78
76	210

n	a(n)
1	1
2	3
3	6
4	7
5	4
6	18
7	14
8	15
9	31
10	12
11	18
12	42
13	8
14	42
15	24
16	31
17	12
18	93
19	30
20	28
21	84
22	54
23	38
24	90
25	13
26	24
27	156
28	98
29	20
30	72
31	42
32	63
33	108
34	36
35	56
36	217
37	24
38	90
39	48
40	60
41	32
42	252
43	54
44	126
45	124
46	114
47	62
48	186
49	183
50	39
51	72
52	56
53	44
54	468
55	72
56	210
57	180
58	60
59	74
60	168
61	48
62	126
63	434
64	127
65	32
66	324
67	90
68	84
69	228
70	168
71	98
72	465
73	60
74	72
75	78
76	210