A374990 - cp's OEIS frontend

A374990 Lexicographically earliest sequence of distinct nonnegative integers such that for any n >= 0, the concatenation of the binary expansions of n and a(n), in at least one way, is palindromic.

n	a(n)
0	0
1	1
2	5
3	3
4	9
5	2
6	11
7	7
8	17
9	4
10	21
11	6
12	19
13	22
14	23
15	15
16	33
17	8
18	41
19	12
20	37
21	10
22	13
23	14
24	35
25	38
26	43
27	27
28	39
29	46
30	47
31	31
32	65
33	16
34	81
35	24
36	73
37	20
38	25
39	28
40	69
41	18
42	85
43	26
44	77
45	45
46	29
47	30
48	67
49	70
50	83
51	51
52	75
53	86
54	91
55	59
56	71
57	78
58	87
59	55
60	79
61	94
62	95
63	63
64	129
65	32
66	161

[0, 1, 5, 3, 9, 2, 11, 7, 17, 4, 21, 6, 19, 22, 23, 15, 33, 8, 41, 12, 37, 10, 13, 14, 35, 38, 43, 27, 39, 46, 47, 31, 65, 16, 81, 24, 73, 20, 25, 28, 69, 18, 85, 26, 77, 45, 29, 30, 67, 70, 83, 51, 75, 86, 91, 59, 71, 78, 87, 55, 79, 94, 95, 63, 129, 32, 161]

cp's OEIS Frontend

A374990 Lexicographically earliest sequence of distinct nonnegative integers such that for any n >= 0, the concatenation of the binary expansions of n and a(n), in at least one way, is palindromic.

Table of values

List of values

n	a(n)
0	0
1	1
2	5
3	3
4	9
5	2
6	11
7	7
8	17
9	4
10	21
11	6
12	19
13	22
14	23
15	15
16	33
17	8
18	41
19	12
20	37
21	10
22	13
23	14
24	35
25	38
26	43
27	27
28	39
29	46
30	47
31	31
32	65
33	16
34	81
35	24
36	73
37	20
38	25
39	28
40	69
41	18
42	85
43	26
44	77
45	45
46	29
47	30
48	67
49	70
50	83
51	51
52	75
53	86
54	91
55	59
56	71
57	78
58	87
59	55
60	79
61	94
62	95
63	63
64	129
65	32
66	161

n	a(n)
0	0
1	1
2	5
3	3
4	9
5	2
6	11
7	7
8	17
9	4
10	21
11	6
12	19
13	22
14	23
15	15
16	33
17	8
18	41
19	12
20	37
21	10
22	13
23	14
24	35
25	38
26	43
27	27
28	39
29	46
30	47
31	31
32	65
33	16
34	81
35	24
36	73
37	20
38	25
39	28
40	69
41	18
42	85
43	26
44	77
45	45
46	29
47	30
48	67
49	70
50	83
51	51
52	75
53	86
54	91
55	59
56	71
57	78
58	87
59	55
60	79
61	94
62	95
63	63
64	129
65	32
66	161

n	a(n)
0	0
1	1
2	5
3	3
4	9
5	2
6	11
7	7
8	17
9	4
10	21
11	6
12	19
13	22
14	23
15	15
16	33
17	8
18	41
19	12
20	37
21	10
22	13
23	14
24	35
25	38
26	43
27	27
28	39
29	46
30	47
31	31
32	65
33	16
34	81
35	24
36	73
37	20
38	25
39	28
40	69
41	18
42	85
43	26
44	77
45	45
46	29
47	30
48	67
49	70
50	83
51	51
52	75
53	86
54	91
55	59
56	71
57	78
58	87
59	55
60	79
61	94
62	95
63	63
64	129
65	32
66	161