A269857 - cp's OEIS frontend

A269857 Permutation of natural numbers: a(1) = 1; if n is an odd prime, a(n) = A250469(a(A026233(n))), else a(n) = 2*(a(A026233(n))).

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	9
8	8
9	10
10	12
11	7
12	18
13	15
14	16
15	20
16	24
17	25
18	14
19	21
20	36
21	30
22	32
23	27
24	40
25	48
26	50
27	28
28	42
29	33
30	72
31	11
32	60
33	64
34	54
35	80
36	96
37	51
38	100
39	56
40	84
41	35
42	66
43	45
44	144
45	22
46	120
47	57
48	128
49	108
50	160
51	192
52	102
53	69
54	200
55	112
56	168
57	70
58	132
59	49
60	90
61	39
62	288
63	44
64	240
65	114
66	256
67	55
68	216
69	320
70	384
71	105
72	204
73	87
74	138
75	400

[1, 2, 3, 4, 5, 6, 9, 8, 10, 12, 7, 18, 15, 16, 20, 24, 25, 14, 21, 36, 30, 32, 27, 40, 48, 50, 28, 42, 33, 72, 11, 60, 64, 54, 80, 96, 51, 100, 56, 84, 35, 66, 45, 144, 22, 120, 57, 128, 108, 160, 192, 102, 69, 200, 112, 168, 70, 132, 49, 90, 39, 288, 44, 240, 114, 256, 55, 216, 320, 384, 105, 204, 87, 138, 400]

cp's OEIS Frontend

A269857 Permutation of natural numbers: a(1) = 1; if n is an odd prime, a(n) = A250469(a(A026233(n))), else a(n) = 2*(a(A026233(n))).

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	9
8	8
9	10
10	12
11	7
12	18
13	15
14	16
15	20
16	24
17	25
18	14
19	21
20	36
21	30
22	32
23	27
24	40
25	48
26	50
27	28
28	42
29	33
30	72
31	11
32	60
33	64
34	54
35	80
36	96
37	51
38	100
39	56
40	84
41	35
42	66
43	45
44	144
45	22
46	120
47	57
48	128
49	108
50	160
51	192
52	102
53	69
54	200
55	112
56	168
57	70
58	132
59	49
60	90
61	39
62	288
63	44
64	240
65	114
66	256
67	55
68	216
69	320
70	384
71	105
72	204
73	87
74	138
75	400

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	9
8	8
9	10
10	12
11	7
12	18
13	15
14	16
15	20
16	24
17	25
18	14
19	21
20	36
21	30
22	32
23	27
24	40
25	48
26	50
27	28
28	42
29	33
30	72
31	11
32	60
33	64
34	54
35	80
36	96
37	51
38	100
39	56
40	84
41	35
42	66
43	45
44	144
45	22
46	120
47	57
48	128
49	108
50	160
51	192
52	102
53	69
54	200
55	112
56	168
57	70
58	132
59	49
60	90
61	39
62	288
63	44
64	240
65	114
66	256
67	55
68	216
69	320
70	384
71	105
72	204
73	87
74	138
75	400

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	9
8	8
9	10
10	12
11	7
12	18
13	15
14	16
15	20
16	24
17	25
18	14
19	21
20	36
21	30
22	32
23	27
24	40
25	48
26	50
27	28
28	42
29	33
30	72
31	11
32	60
33	64
34	54
35	80
36	96
37	51
38	100
39	56
40	84
41	35
42	66
43	45
44	144
45	22
46	120
47	57
48	128
49	108
50	160
51	192
52	102
53	69
54	200
55	112
56	168
57	70
58	132
59	49
60	90
61	39
62	288
63	44
64	240
65	114
66	256
67	55
68	216
69	320
70	384
71	105
72	204
73	87
74	138
75	400