A145800 - cp's OEIS frontend

A145800 a(n) = the smallest positive integer that is an (odd) palindrome when represented in binary and that contains within it the binary representation of n.

n	a(n)
1	1
2	5
3	3
4	9
5	5
6	27
7	7
8	17
9	9
10	21
11	27
12	51
13	27
14	93
15	15
16	33
17	17
18	73
19	51
20	165
21	21
22	45
23	93
24	99
25	51
26	107
27	27
28	231
29	93
30	189
31	31
32	65
33	33
34	273
35	99
36	73
37	165
38	153
39	231
40	325
41	165
42	85
43	107
44	717
45	45
46	93
47	189
48	195
49	99
50	403
51	51
52	843
53	107
54	219
55	119
56	455
57	231
58	471
59	119
60	633
61	189
62	381
63	63

[1, 5, 3, 9, 5, 27, 7, 17, 9, 21, 27, 51, 27, 93, 15, 33, 17, 73, 51, 165, 21, 45, 93, 99, 51, 107, 27, 231, 93, 189, 31, 65, 33, 273, 99, 73, 165, 153, 231, 325, 165, 85, 107, 717, 45, 93, 189, 195, 99, 403, 51, 843, 107, 219, 119, 455, 231, 471, 119, 633, 189, 381, 63]

cp's OEIS Frontend

A145800 a(n) = the smallest positive integer that is an (odd) palindrome when represented in binary and that contains within it the binary representation of n.

Table of values

List of values

n	a(n)
1	1
2	5
3	3
4	9
5	5
6	27
7	7
8	17
9	9
10	21
11	27
12	51
13	27
14	93
15	15
16	33
17	17
18	73
19	51
20	165
21	21
22	45
23	93
24	99
25	51
26	107
27	27
28	231
29	93
30	189
31	31
32	65
33	33
34	273
35	99
36	73
37	165
38	153
39	231
40	325
41	165
42	85
43	107
44	717
45	45
46	93
47	189
48	195
49	99
50	403
51	51
52	843
53	107
54	219
55	119
56	455
57	231
58	471
59	119
60	633
61	189
62	381
63	63

n	a(n)
1	1
2	5
3	3
4	9
5	5
6	27
7	7
8	17
9	9
10	21
11	27
12	51
13	27
14	93
15	15
16	33
17	17
18	73
19	51
20	165
21	21
22	45
23	93
24	99
25	51
26	107
27	27
28	231
29	93
30	189
31	31
32	65
33	33
34	273
35	99
36	73
37	165
38	153
39	231
40	325
41	165
42	85
43	107
44	717
45	45
46	93
47	189
48	195
49	99
50	403
51	51
52	843
53	107
54	219
55	119
56	455
57	231
58	471
59	119
60	633
61	189
62	381
63	63

n	a(n)
1	1
2	5
3	3
4	9
5	5
6	27
7	7
8	17
9	9
10	21
11	27
12	51
13	27
14	93
15	15
16	33
17	17
18	73
19	51
20	165
21	21
22	45
23	93
24	99
25	51
26	107
27	27
28	231
29	93
30	189
31	31
32	65
33	33
34	273
35	99
36	73
37	165
38	153
39	231
40	325
41	165
42	85
43	107
44	717
45	45
46	93
47	189
48	195
49	99
50	403
51	51
52	843
53	107
54	219
55	119
56	455
57	231
58	471
59	119
60	633
61	189
62	381
63	63