A228087 - cp's OEIS frontend

A228087 a(n) = largest k which satisfies n = k + bitcount(k), or 0 if no such k exists. Here bitcount(k) (A000120) gives the number of 1's in binary representation of nonnegative integer k.

n	a(n)
0	0
1	0
2	1
3	2
4	0
5	4
6	0
7	5
8	6
9	8
10	7
11	9
12	10
13	0
14	12
15	0
16	13
17	16
18	0
19	17
20	18
21	0
22	20
23	0
24	21
25	22
26	24
27	23
28	25
29	26
30	0
31	28
32	0
33	32
34	30
35	33
36	34
37	0
38	36
39	0
40	37
41	38
42	40
43	39
44	41
45	42
46	0
47	44
48	0
49	45
50	48
51	0
52	49
53	50
54	0
55	52
56	0
57	53
58	54
59	56
60	55
61	57
62	58
63	0
64	60
65	64
66	61
67	65
68	66
69	63
70	68
71	0

[0, 0, 1, 2, 0, 4, 0, 5, 6, 8, 7, 9, 10, 0, 12, 0, 13, 16, 0, 17, 18, 0, 20, 0, 21, 22, 24, 23, 25, 26, 0, 28, 0, 32, 30, 33, 34, 0, 36, 0, 37, 38, 40, 39, 41, 42, 0, 44, 0, 45, 48, 0, 49, 50, 0, 52, 0, 53, 54, 56, 55, 57, 58, 0, 60, 64, 61, 65, 66, 63, 68, 0]

cp's OEIS Frontend

A228087 a(n) = largest k which satisfies n = k + bitcount(k), or 0 if no such k exists. 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)
0	0
1	0
2	1
3	2
4	0
5	4
6	0
7	5
8	6
9	8
10	7
11	9
12	10
13	0
14	12
15	0
16	13
17	16
18	0
19	17
20	18
21	0
22	20
23	0
24	21
25	22
26	24
27	23
28	25
29	26
30	0
31	28
32	0
33	32
34	30
35	33
36	34
37	0
38	36
39	0
40	37
41	38
42	40
43	39
44	41
45	42
46	0
47	44
48	0
49	45
50	48
51	0
52	49
53	50
54	0
55	52
56	0
57	53
58	54
59	56
60	55
61	57
62	58
63	0
64	60
65	64
66	61
67	65
68	66
69	63
70	68
71	0

n	a(n)
0	0
1	0
2	1
3	2
4	0
5	4
6	0
7	5
8	6
9	8
10	7
11	9
12	10
13	0
14	12
15	0
16	13
17	16
18	0
19	17
20	18
21	0
22	20
23	0
24	21
25	22
26	24
27	23
28	25
29	26
30	0
31	28
32	0
33	32
34	30
35	33
36	34
37	0
38	36
39	0
40	37
41	38
42	40
43	39
44	41
45	42
46	0
47	44
48	0
49	45
50	48
51	0
52	49
53	50
54	0
55	52
56	0
57	53
58	54
59	56
60	55
61	57
62	58
63	0
64	60
65	64
66	61
67	65
68	66
69	63
70	68
71	0

n	a(n)
0	0
1	0
2	1
3	2
4	0
5	4
6	0
7	5
8	6
9	8
10	7
11	9
12	10
13	0
14	12
15	0
16	13
17	16
18	0
19	17
20	18
21	0
22	20
23	0
24	21
25	22
26	24
27	23
28	25
29	26
30	0
31	28
32	0
33	32
34	30
35	33
36	34
37	0
38	36
39	0
40	37
41	38
42	40
43	39
44	41
45	42
46	0
47	44
48	0
49	45
50	48
51	0
52	49
53	50
54	0
55	52
56	0
57	53
58	54
59	56
60	55
61	57
62	58
63	0
64	60
65	64
66	61
67	65
68	66
69	63
70	68
71	0