A269867 - cp's OEIS frontend

A269867 Self-inverse permutation of natural numbers: a(1) = 1, for even n, a(n) = A250469(1+a(n/2)), for odd n, a(n) = 2*a(A268674(n)-1).

n	a(n)
1	1
2	3
3	2
4	9
5	6
6	5
7	18
8	27
9	4
10	11
11	10
12	15
13	22
14	23
15	12
16	81
17	30
18	7
19	162
20	33
21	36
22	13
23	14
24	45
25	54
26	29
27	8
28	69
29	26
30	17
31	138
32	243
33	20
34	37
35	46
36	21
37	34
38	167
39	44
40	99
41	42
42	41
43	198
44	39
45	24
46	35
47	82
48	135
49	90
50	91
51	60
52	87
53	70
54	25
55	66
56	207
57	324
58	65
59	174
60	51
61	130
62	149
63	72
64	729
65	58
66	55
67	102
68	111
69	28
70	53
71	110
72	63
73	106
74	77
75	108
76	501
77	74
78	115
79	126
80	297
81	16
82	47

[1, 3, 2, 9, 6, 5, 18, 27, 4, 11, 10, 15, 22, 23, 12, 81, 30, 7, 162, 33, 36, 13, 14, 45, 54, 29, 8, 69, 26, 17, 138, 243, 20, 37, 46, 21, 34, 167, 44, 99, 42, 41, 198, 39, 24, 35, 82, 135, 90, 91, 60, 87, 70, 25, 66, 207, 324, 65, 174, 51, 130, 149, 72, 729, 58, 55, 102, 111, 28, 53, 110, 63, 106, 77, 108, 501, 74, 115, 126, 297, 16, 47]

cp's OEIS Frontend

A269867 Self-inverse permutation of natural numbers: a(1) = 1, for even n, a(n) = A250469(1+a(n/2)), for odd n, a(n) = 2*a(A268674(n)-1).

Table of values

List of values

n	a(n)
1	1
2	3
3	2
4	9
5	6
6	5
7	18
8	27
9	4
10	11
11	10
12	15
13	22
14	23
15	12
16	81
17	30
18	7
19	162
20	33
21	36
22	13
23	14
24	45
25	54
26	29
27	8
28	69
29	26
30	17
31	138
32	243
33	20
34	37
35	46
36	21
37	34
38	167
39	44
40	99
41	42
42	41
43	198
44	39
45	24
46	35
47	82
48	135
49	90
50	91
51	60
52	87
53	70
54	25
55	66
56	207
57	324
58	65
59	174
60	51
61	130
62	149
63	72
64	729
65	58
66	55
67	102
68	111
69	28
70	53
71	110
72	63
73	106
74	77
75	108
76	501
77	74
78	115
79	126
80	297
81	16
82	47

n	a(n)
1	1
2	3
3	2
4	9
5	6
6	5
7	18
8	27
9	4
10	11
11	10
12	15
13	22
14	23
15	12
16	81
17	30
18	7
19	162
20	33
21	36
22	13
23	14
24	45
25	54
26	29
27	8
28	69
29	26
30	17
31	138
32	243
33	20
34	37
35	46
36	21
37	34
38	167
39	44
40	99
41	42
42	41
43	198
44	39
45	24
46	35
47	82
48	135
49	90
50	91
51	60
52	87
53	70
54	25
55	66
56	207
57	324
58	65
59	174
60	51
61	130
62	149
63	72
64	729
65	58
66	55
67	102
68	111
69	28
70	53
71	110
72	63
73	106
74	77
75	108
76	501
77	74
78	115
79	126
80	297
81	16
82	47

n	a(n)
1	1
2	3
3	2
4	9
5	6
6	5
7	18
8	27
9	4
10	11
11	10
12	15
13	22
14	23
15	12
16	81
17	30
18	7
19	162
20	33
21	36
22	13
23	14
24	45
25	54
26	29
27	8
28	69
29	26
30	17
31	138
32	243
33	20
34	37
35	46
36	21
37	34
38	167
39	44
40	99
41	42
42	41
43	198
44	39
45	24
46	35
47	82
48	135
49	90
50	91
51	60
52	87
53	70
54	25
55	66
56	207
57	324
58	65
59	174
60	51
61	130
62	149
63	72
64	729
65	58
66	55
67	102
68	111
69	28
70	53
71	110
72	63
73	106
74	77
75	108
76	501
77	74
78	115
79	126
80	297
81	16
82	47