A267099 - cp's OEIS frontend

A267099 Fully multiplicative involution swapping the positions of 4k+1 and 4k+3 primes: a(1) = 1; a(prime(k)) = A267101(k), a(xy) = a(x)a(y) for x, y > 1.

n	a(n)
1	1
2	2
3	5
4	4
5	3
6	10
7	13
8	8
9	25
10	6
11	17
12	20
13	7
14	26
15	15
16	16
17	11
18	50
19	29
20	12
21	65
22	34
23	37
24	40
25	9
26	14
27	125
28	52
29	19
30	30
31	41
32	32
33	85
34	22
35	39
36	100
37	23
38	58
39	35
40	24
41	31
42	130
43	53
44	68
45	75
46	74
47	61
48	80
49	169
50	18
51	55
52	28
53	43
54	250
55	51
56	104
57	145
58	38
59	73
60	60
61	47
62	82
63	325
64	64
65	21
66	170
67	89
68	44
69	185
70	78
71	97
72	200
73	59
74	46
75	45
76	116
77	221
78	70
79	101

[1, 2, 5, 4, 3, 10, 13, 8, 25, 6, 17, 20, 7, 26, 15, 16, 11, 50, 29, 12, 65, 34, 37, 40, 9, 14, 125, 52, 19, 30, 41, 32, 85, 22, 39, 100, 23, 58, 35, 24, 31, 130, 53, 68, 75, 74, 61, 80, 169, 18, 55, 28, 43, 250, 51, 104, 145, 38, 73, 60, 47, 82, 325, 64, 21, 170, 89, 44, 185, 78, 97, 200, 59, 46, 45, 116, 221, 70, 101]

cp's OEIS Frontend

A267099 Fully multiplicative involution swapping the positions of 4k+1 and 4k+3 primes: a(1) = 1; a(prime(k)) = A267101(k), a(xy) = a(x)a(y) for x, y > 1.

Table of values

List of values

n	a(n)
1	1
2	2
3	5
4	4
5	3
6	10
7	13
8	8
9	25
10	6
11	17
12	20
13	7
14	26
15	15
16	16
17	11
18	50
19	29
20	12
21	65
22	34
23	37
24	40
25	9
26	14
27	125
28	52
29	19
30	30
31	41
32	32
33	85
34	22
35	39
36	100
37	23
38	58
39	35
40	24
41	31
42	130
43	53
44	68
45	75
46	74
47	61
48	80
49	169
50	18
51	55
52	28
53	43
54	250
55	51
56	104
57	145
58	38
59	73
60	60
61	47
62	82
63	325
64	64
65	21
66	170
67	89
68	44
69	185
70	78
71	97
72	200
73	59
74	46
75	45
76	116
77	221
78	70
79	101

n	a(n)
1	1
2	2
3	5
4	4
5	3
6	10
7	13
8	8
9	25
10	6
11	17
12	20
13	7
14	26
15	15
16	16
17	11
18	50
19	29
20	12
21	65
22	34
23	37
24	40
25	9
26	14
27	125
28	52
29	19
30	30
31	41
32	32
33	85
34	22
35	39
36	100
37	23
38	58
39	35
40	24
41	31
42	130
43	53
44	68
45	75
46	74
47	61
48	80
49	169
50	18
51	55
52	28
53	43
54	250
55	51
56	104
57	145
58	38
59	73
60	60
61	47
62	82
63	325
64	64
65	21
66	170
67	89
68	44
69	185
70	78
71	97
72	200
73	59
74	46
75	45
76	116
77	221
78	70
79	101

cp's OEIS Frontend

A267099 Fully multiplicative involution swapping the positions of 4k+1 and 4k+3 primes: a(1) = 1; a(prime(k)) = A267101(k), a(x*y) = a(x)*a(y) for x, y > 1.

Table of values

List of values

A267099 Fully multiplicative involution swapping the positions of 4k+1 and 4k+3 primes: a(1) = 1; a(prime(k)) = A267101(k), a(xy) = a(x)a(y) for x, y > 1.

n	a(n)
1	1
2	2
3	5
4	4
5	3
6	10
7	13
8	8
9	25
10	6
11	17
12	20
13	7
14	26
15	15
16	16
17	11
18	50
19	29
20	12
21	65
22	34
23	37
24	40
25	9
26	14
27	125
28	52
29	19
30	30
31	41
32	32
33	85
34	22
35	39
36	100
37	23
38	58
39	35
40	24
41	31
42	130
43	53
44	68
45	75
46	74
47	61
48	80
49	169
50	18
51	55
52	28
53	43
54	250
55	51
56	104
57	145
58	38
59	73
60	60
61	47
62	82
63	325
64	64
65	21
66	170
67	89
68	44
69	185
70	78
71	97
72	200
73	59
74	46
75	45
76	116
77	221
78	70
79	101