A257801 - cp's OEIS frontend

A257801 Permutation of natural numbers: a(1)=1; a(oddprime(n)) = lucky(1+a(n)), a(not_an_oddprime(n)) = unlucky(a(n-1)).

n	a(n)
1	1
2	2
3	3
4	4
5	7
6	5
7	9
8	6
9	11
10	8
11	13
12	14
13	25
14	10
15	17
16	12
17	15
18	19
19	33
20	20
21	35
22	16
23	21
24	24
25	18
26	22
27	27
28	45
29	43
30	28
31	31
32	47
33	23
34	29
35	34
36	26
37	51
38	30
39	38
40	59
41	63
42	57
43	115
44	39
45	42
46	61
47	37
48	32
49	40
50	46
51	36
52	66
53	73
54	41
55	52
56	78
57	83
58	76
59	49
60	146
61	67
62	53
63	56
64	81
65	50
66	44
67	79
68	54
69	60
70	48
71	163
72	86
73	87
74	95
75	55
76	68
77	101
78	107
79	171
80	98
81	64

[1, 2, 3, 4, 7, 5, 9, 6, 11, 8, 13, 14, 25, 10, 17, 12, 15, 19, 33, 20, 35, 16, 21, 24, 18, 22, 27, 45, 43, 28, 31, 47, 23, 29, 34, 26, 51, 30, 38, 59, 63, 57, 115, 39, 42, 61, 37, 32, 40, 46, 36, 66, 73, 41, 52, 78, 83, 76, 49, 146, 67, 53, 56, 81, 50, 44, 79, 54, 60, 48, 163, 86, 87, 95, 55, 68, 101, 107, 171, 98, 64]

cp's OEIS Frontend

A257801 Permutation of natural numbers: a(1)=1; a(oddprime(n)) = lucky(1+a(n)), a(not_an_oddprime(n)) = unlucky(a(n-1)).

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	4
5	7
6	5
7	9
8	6
9	11
10	8
11	13
12	14
13	25
14	10
15	17
16	12
17	15
18	19
19	33
20	20
21	35
22	16
23	21
24	24
25	18
26	22
27	27
28	45
29	43
30	28
31	31
32	47
33	23
34	29
35	34
36	26
37	51
38	30
39	38
40	59
41	63
42	57
43	115
44	39
45	42
46	61
47	37
48	32
49	40
50	46
51	36
52	66
53	73
54	41
55	52
56	78
57	83
58	76
59	49
60	146
61	67
62	53
63	56
64	81
65	50
66	44
67	79
68	54
69	60
70	48
71	163
72	86
73	87
74	95
75	55
76	68
77	101
78	107
79	171
80	98
81	64

n	a(n)
1	1
2	2
3	3
4	4
5	7
6	5
7	9
8	6
9	11
10	8
11	13
12	14
13	25
14	10
15	17
16	12
17	15
18	19
19	33
20	20
21	35
22	16
23	21
24	24
25	18
26	22
27	27
28	45
29	43
30	28
31	31
32	47
33	23
34	29
35	34
36	26
37	51
38	30
39	38
40	59
41	63
42	57
43	115
44	39
45	42
46	61
47	37
48	32
49	40
50	46
51	36
52	66
53	73
54	41
55	52
56	78
57	83
58	76
59	49
60	146
61	67
62	53
63	56
64	81
65	50
66	44
67	79
68	54
69	60
70	48
71	163
72	86
73	87
74	95
75	55
76	68
77	101
78	107
79	171
80	98
81	64

n	a(n)
1	1
2	2
3	3
4	4
5	7
6	5
7	9
8	6
9	11
10	8
11	13
12	14
13	25
14	10
15	17
16	12
17	15
18	19
19	33
20	20
21	35
22	16
23	21
24	24
25	18
26	22
27	27
28	45
29	43
30	28
31	31
32	47
33	23
34	29
35	34
36	26
37	51
38	30
39	38
40	59
41	63
42	57
43	115
44	39
45	42
46	61
47	37
48	32
49	40
50	46
51	36
52	66
53	73
54	41
55	52
56	78
57	83
58	76
59	49
60	146
61	67
62	53
63	56
64	81
65	50
66	44
67	79
68	54
69	60
70	48
71	163
72	86
73	87
74	95
75	55
76	68
77	101
78	107
79	171
80	98
81	64