A264985 - cp's OEIS frontend

A264985 Self-inverse permutation of nonnegative integers: a(n) = (A264983(n)-1) / 2.

n	a(n)
0	0
1	1
2	3
3	2
4	4
5	9
6	6
7	10
8	12
9	5
10	7
11	11
12	8
13	13
14	27
15	18
16	28
17	36
18	15
19	19
20	33
21	24
22	31
23	30
24	21
25	37
26	39
27	14
28	16
29	32
30	23
31	22
32	29
33	20
34	34
35	38
36	17
37	25
38	35
39	26
40	40
41	81
42	54
43	82
44	108
45	45
46	55
47	99
48	72
49	85
50	90
51	63
52	109
53	117
54	42
55	46
56	96
57	69
58	58
59	87
60	60
61	100
62	114
63	51
64	73
65	105
66	78
67	94
68	84
69	57
70	91
71	111
72	48
73	64
74	102
75	75
76	112
77	93
78	66
79	118
80	120
81	41

[0, 1, 3, 2, 4, 9, 6, 10, 12, 5, 7, 11, 8, 13, 27, 18, 28, 36, 15, 19, 33, 24, 31, 30, 21, 37, 39, 14, 16, 32, 23, 22, 29, 20, 34, 38, 17, 25, 35, 26, 40, 81, 54, 82, 108, 45, 55, 99, 72, 85, 90, 63, 109, 117, 42, 46, 96, 69, 58, 87, 60, 100, 114, 51, 73, 105, 78, 94, 84, 57, 91, 111, 48, 64, 102, 75, 112, 93, 66, 118, 120, 41]

cp's OEIS Frontend

A264985 Self-inverse permutation of nonnegative integers: a(n) = (A264983(n)-1) / 2.

Table of values

List of values

n	a(n)
0	0
1	1
2	3
3	2
4	4
5	9
6	6
7	10
8	12
9	5
10	7
11	11
12	8
13	13
14	27
15	18
16	28
17	36
18	15
19	19
20	33
21	24
22	31
23	30
24	21
25	37
26	39
27	14
28	16
29	32
30	23
31	22
32	29
33	20
34	34
35	38
36	17
37	25
38	35
39	26
40	40
41	81
42	54
43	82
44	108
45	45
46	55
47	99
48	72
49	85
50	90
51	63
52	109
53	117
54	42
55	46
56	96
57	69
58	58
59	87
60	60
61	100
62	114
63	51
64	73
65	105
66	78
67	94
68	84
69	57
70	91
71	111
72	48
73	64
74	102
75	75
76	112
77	93
78	66
79	118
80	120
81	41

n	a(n)
0	0
1	1
2	3
3	2
4	4
5	9
6	6
7	10
8	12
9	5
10	7
11	11
12	8
13	13
14	27
15	18
16	28
17	36
18	15
19	19
20	33
21	24
22	31
23	30
24	21
25	37
26	39
27	14
28	16
29	32
30	23
31	22
32	29
33	20
34	34
35	38
36	17
37	25
38	35
39	26
40	40
41	81
42	54
43	82
44	108
45	45
46	55
47	99
48	72
49	85
50	90
51	63
52	109
53	117
54	42
55	46
56	96
57	69
58	58
59	87
60	60
61	100
62	114
63	51
64	73
65	105
66	78
67	94
68	84
69	57
70	91
71	111
72	48
73	64
74	102
75	75
76	112
77	93
78	66
79	118
80	120
81	41

n	a(n)
0	0
1	1
2	3
3	2
4	4
5	9
6	6
7	10
8	12
9	5
10	7
11	11
12	8
13	13
14	27
15	18
16	28
17	36
18	15
19	19
20	33
21	24
22	31
23	30
24	21
25	37
26	39
27	14
28	16
29	32
30	23
31	22
32	29
33	20
34	34
35	38
36	17
37	25
38	35
39	26
40	40
41	81
42	54
43	82
44	108
45	45
46	55
47	99
48	72
49	85
50	90
51	63
52	109
53	117
54	42
55	46
56	96
57	69
58	58
59	87
60	60
61	100
62	114
63	51
64	73
65	105
66	78
67	94
68	84
69	57
70	91
71	111
72	48
73	64
74	102
75	75
76	112
77	93
78	66
79	118
80	120
81	41