A331589 - cp's OEIS frontend

A331589 a(n) is the greatest k such that A331587(n) = k * reverse(k) (where reverse(k) is the binary reversal of k, A030101(k)).

n	a(n)
1	1
2	3
3	5
4	7
5	9
6	13
7	15
8	17
9	21
10	25
11	29
12	27
13	31
14	33
15	41
16	49
17	45
18	57
19	53
20	51
21	61
22	59
23	63
24	65
25	73
26	81
27	97
28	89
29	85
30	105
31	113
32	101
33	93
34	121
35	99
36	109
37	117
38	107
39	115
40	125
41	123
42	119
43	127
44	129
45	145
46	161
47	153
48	177
49	169
50	193
51	165
52	185
53	209
54	201
55	225
56	181
57	197
58	217
59	241

[1, 3, 5, 7, 9, 13, 15, 17, 21, 25, 29, 27, 31, 33, 41, 49, 45, 57, 53, 51, 61, 59, 63, 65, 73, 81, 97, 89, 85, 105, 113, 101, 93, 121, 99, 109, 117, 107, 115, 125, 123, 119, 127, 129, 145, 161, 153, 177, 169, 193, 165, 185, 209, 201, 225, 181, 197, 217, 241]

cp's OEIS Frontend

A331589 a(n) is the greatest k such that A331587(n) = k * reverse(k) (where reverse(k) is the binary reversal of k, A030101(k)).

Table of values

List of values

n	a(n)
1	1
2	3
3	5
4	7
5	9
6	13
7	15
8	17
9	21
10	25
11	29
12	27
13	31
14	33
15	41
16	49
17	45
18	57
19	53
20	51
21	61
22	59
23	63
24	65
25	73
26	81
27	97
28	89
29	85
30	105
31	113
32	101
33	93
34	121
35	99
36	109
37	117
38	107
39	115
40	125
41	123
42	119
43	127
44	129
45	145
46	161
47	153
48	177
49	169
50	193
51	165
52	185
53	209
54	201
55	225
56	181
57	197
58	217
59	241

n	a(n)
1	1
2	3
3	5
4	7
5	9
6	13
7	15
8	17
9	21
10	25
11	29
12	27
13	31
14	33
15	41
16	49
17	45
18	57
19	53
20	51
21	61
22	59
23	63
24	65
25	73
26	81
27	97
28	89
29	85
30	105
31	113
32	101
33	93
34	121
35	99
36	109
37	117
38	107
39	115
40	125
41	123
42	119
43	127
44	129
45	145
46	161
47	153
48	177
49	169
50	193
51	165
52	185
53	209
54	201
55	225
56	181
57	197
58	217
59	241

n	a(n)
1	1
2	3
3	5
4	7
5	9
6	13
7	15
8	17
9	21
10	25
11	29
12	27
13	31
14	33
15	41
16	49
17	45
18	57
19	53
20	51
21	61
22	59
23	63
24	65
25	73
26	81
27	97
28	89
29	85
30	105
31	113
32	101
33	93
34	121
35	99
36	109
37	117
38	107
39	115
40	125
41	123
42	119
43	127
44	129
45	145
46	161
47	153
48	177
49	169
50	193
51	165
52	185
53	209
54	201
55	225
56	181
57	197
58	217
59	241