A125121 - cp's OEIS frontend

A125121 Sturdy numbers: n such that in binary notation k*n has at least as many 1-bits as n for all k>0.

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	10
11	12
12	14
13	15
14	16
15	17
16	18
17	20
18	21
19	24
20	28
21	30
22	31
23	32
24	33
25	34
26	35
27	36
28	40
29	42
30	45
31	48
32	49
33	51
34	56
35	60
36	62
37	63
38	64
39	65
40	66
41	68
42	69
43	70
44	72
45	73
46	75
47	80
48	84
49	85
50	89
51	90
52	93
53	96
54	98
55	102
56	105
57	112
58	120
59	124
60	126
61	127
62	128
63	129
64	130
65	132
66	133
67	135
68	136

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 17, 18, 20, 21, 24, 28, 30, 31, 32, 33, 34, 35, 36, 40, 42, 45, 48, 49, 51, 56, 60, 62, 63, 64, 65, 66, 68, 69, 70, 72, 73, 75, 80, 84, 85, 89, 90, 93, 96, 98, 102, 105, 112, 120, 124, 126, 127, 128, 129, 130, 132, 133, 135, 136]

cp's OEIS Frontend

A125121 Sturdy numbers: n such that in binary notation k*n has at least as many 1-bits as n for all k>0.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	10
11	12
12	14
13	15
14	16
15	17
16	18
17	20
18	21
19	24
20	28
21	30
22	31
23	32
24	33
25	34
26	35
27	36
28	40
29	42
30	45
31	48
32	49
33	51
34	56
35	60
36	62
37	63
38	64
39	65
40	66
41	68
42	69
43	70
44	72
45	73
46	75
47	80
48	84
49	85
50	89
51	90
52	93
53	96
54	98
55	102
56	105
57	112
58	120
59	124
60	126
61	127
62	128
63	129
64	130
65	132
66	133
67	135
68	136

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	10
11	12
12	14
13	15
14	16
15	17
16	18
17	20
18	21
19	24
20	28
21	30
22	31
23	32
24	33
25	34
26	35
27	36
28	40
29	42
30	45
31	48
32	49
33	51
34	56
35	60
36	62
37	63
38	64
39	65
40	66
41	68
42	69
43	70
44	72
45	73
46	75
47	80
48	84
49	85
50	89
51	90
52	93
53	96
54	98
55	102
56	105
57	112
58	120
59	124
60	126
61	127
62	128
63	129
64	130
65	132
66	133
67	135
68	136

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	10
11	12
12	14
13	15
14	16
15	17
16	18
17	20
18	21
19	24
20	28
21	30
22	31
23	32
24	33
25	34
26	35
27	36
28	40
29	42
30	45
31	48
32	49
33	51
34	56
35	60
36	62
37	63
38	64
39	65
40	66
41	68
42	69
43	70
44	72
45	73
46	75
47	80
48	84
49	85
50	89
51	90
52	93
53	96
54	98
55	102
56	105
57	112
58	120
59	124
60	126
61	127
62	128
63	129
64	130
65	132
66	133
67	135
68	136