A228090 - cp's OEIS frontend

A228090 Numbers k for which a sum k + bitcount(k) cannot be obtained as a sum k2 + bitcount(k2) for any other k2<>k . Here bitcount(k) (A000120) gives the number of 1's in binary representation of nonnegative integer k.

n	a(n)
1	0
2	1
3	2
4	5
5	6
6	7
7	8
8	9
9	10
10	13
11	18
12	21
13	22
14	23
15	24
16	25
17	26
18	30
19	33
20	37
21	38
22	39
23	40
24	41
25	42
26	45
27	50
28	53
29	54
30	55
31	56
32	57
33	58
34	61
35	63
36	64
37	66
38	69
39	70
40	71
41	72
42	73
43	74
44	77
45	82
46	85
47	86
48	87
49	88
50	89
51	90
52	94
53	97
54	101
55	102
56	103
57	104
58	105
59	106
60	109
61	114
62	117
63	118
64	119
65	120

[0, 1, 2, 5, 6, 7, 8, 9, 10, 13, 18, 21, 22, 23, 24, 25, 26, 30, 33, 37, 38, 39, 40, 41, 42, 45, 50, 53, 54, 55, 56, 57, 58, 61, 63, 64, 66, 69, 70, 71, 72, 73, 74, 77, 82, 85, 86, 87, 88, 89, 90, 94, 97, 101, 102, 103, 104, 105, 106, 109, 114, 117, 118, 119, 120]

cp's OEIS Frontend

A228090 Numbers k for which a sum k + bitcount(k) cannot be obtained as a sum k2 + bitcount(k2) for any other k2<>k . Here bitcount(k) (A000120) gives the number of 1's in binary representation of nonnegative integer k.

Table of values

List of values

n	a(n)
1	0
2	1
3	2
4	5
5	6
6	7
7	8
8	9
9	10
10	13
11	18
12	21
13	22
14	23
15	24
16	25
17	26
18	30
19	33
20	37
21	38
22	39
23	40
24	41
25	42
26	45
27	50
28	53
29	54
30	55
31	56
32	57
33	58
34	61
35	63
36	64
37	66
38	69
39	70
40	71
41	72
42	73
43	74
44	77
45	82
46	85
47	86
48	87
49	88
50	89
51	90
52	94
53	97
54	101
55	102
56	103
57	104
58	105
59	106
60	109
61	114
62	117
63	118
64	119
65	120

n	a(n)
1	0
2	1
3	2
4	5
5	6
6	7
7	8
8	9
9	10
10	13
11	18
12	21
13	22
14	23
15	24
16	25
17	26
18	30
19	33
20	37
21	38
22	39
23	40
24	41
25	42
26	45
27	50
28	53
29	54
30	55
31	56
32	57
33	58
34	61
35	63
36	64
37	66
38	69
39	70
40	71
41	72
42	73
43	74
44	77
45	82
46	85
47	86
48	87
49	88
50	89
51	90
52	94
53	97
54	101
55	102
56	103
57	104
58	105
59	106
60	109
61	114
62	117
63	118
64	119
65	120

n	a(n)
1	0
2	1
3	2
4	5
5	6
6	7
7	8
8	9
9	10
10	13
11	18
12	21
13	22
14	23
15	24
16	25
17	26
18	30
19	33
20	37
21	38
22	39
23	40
24	41
25	42
26	45
27	50
28	53
29	54
30	55
31	56
32	57
33	58
34	61
35	63
36	64
37	66
38	69
39	70
40	71
41	72
42	73
43	74
44	77
45	82
46	85
47	86
48	87
49	88
50	89
51	90
52	94
53	97
54	101
55	102
56	103
57	104
58	105
59	106
60	109
61	114
62	117
63	118
64	119
65	120