A057923 - cp's OEIS frontend

A057923 a(0)=0, a(1)=2, a(n) = smallest number such that sequence b(n) = {a(n-1) BITWISE OR a(n)} is strictly monotonically increasing.

n	a(n)
0	0
1	2
2	1
3	4
4	2
5	5
6	8
7	6
8	9
9	16
10	10
11	17
12	12
13	18
14	13
15	32
16	14
17	33
18	16
19	34
20	17
21	36
22	18
23	37
24	24
25	38
26	25
27	64
28	26
29	65
30	28
31	66
32	29
33	96
34	30
35	97
36	128
37	98
38	129
39	100
40	130
41	101
42	136
43	102
44	137
45	112
46	138
47	113
48	140
49	114
50	141
51	256
52	142
53	257
54	144
55	258
56	145
57	260
58	146
59	261
60	152
61	262
62	153

[0, 2, 1, 4, 2, 5, 8, 6, 9, 16, 10, 17, 12, 18, 13, 32, 14, 33, 16, 34, 17, 36, 18, 37, 24, 38, 25, 64, 26, 65, 28, 66, 29, 96, 30, 97, 128, 98, 129, 100, 130, 101, 136, 102, 137, 112, 138, 113, 140, 114, 141, 256, 142, 257, 144, 258, 145, 260, 146, 261, 152, 262, 153]

cp's OEIS Frontend

A057923 a(0)=0, a(1)=2, a(n) = smallest number such that sequence b(n) = {a(n-1) BITWISE OR a(n)} is strictly monotonically increasing.

Table of values

List of values

n	a(n)
0	0
1	2
2	1
3	4
4	2
5	5
6	8
7	6
8	9
9	16
10	10
11	17
12	12
13	18
14	13
15	32
16	14
17	33
18	16
19	34
20	17
21	36
22	18
23	37
24	24
25	38
26	25
27	64
28	26
29	65
30	28
31	66
32	29
33	96
34	30
35	97
36	128
37	98
38	129
39	100
40	130
41	101
42	136
43	102
44	137
45	112
46	138
47	113
48	140
49	114
50	141
51	256
52	142
53	257
54	144
55	258
56	145
57	260
58	146
59	261
60	152
61	262
62	153

n	a(n)
0	0
1	2
2	1
3	4
4	2
5	5
6	8
7	6
8	9
9	16
10	10
11	17
12	12
13	18
14	13
15	32
16	14
17	33
18	16
19	34
20	17
21	36
22	18
23	37
24	24
25	38
26	25
27	64
28	26
29	65
30	28
31	66
32	29
33	96
34	30
35	97
36	128
37	98
38	129
39	100
40	130
41	101
42	136
43	102
44	137
45	112
46	138
47	113
48	140
49	114
50	141
51	256
52	142
53	257
54	144
55	258
56	145
57	260
58	146
59	261
60	152
61	262
62	153

n	a(n)
0	0
1	2
2	1
3	4
4	2
5	5
6	8
7	6
8	9
9	16
10	10
11	17
12	12
13	18
14	13
15	32
16	14
17	33
18	16
19	34
20	17
21	36
22	18
23	37
24	24
25	38
26	25
27	64
28	26
29	65
30	28
31	66
32	29
33	96
34	30
35	97
36	128
37	98
38	129
39	100
40	130
41	101
42	136
43	102
44	137
45	112
46	138
47	113
48	140
49	114
50	141
51	256
52	142
53	257
54	144
55	258
56	145
57	260
58	146
59	261
60	152
61	262
62	153