A327188 - cp's OEIS frontend

A327188 For any n >= 0: consider the different ways to split the binary representation of n into two (possibly empty) parts, say with value x and y; a(n) is the greatest possible value of x AND y (where AND denotes the bitwise AND operator).

n	a(n)
0	0
1	0
2	0
3	1
4	0
5	1
6	0
7	1
8	0
9	1
10	2
11	2
12	0
13	1
14	2
15	3
16	0
17	1
18	2
19	2
20	0
21	1
22	2
23	2
24	0
25	1
26	2
27	3
28	0
29	1
30	2
31	3
32	0
33	1
34	2
35	2
36	4
37	4
38	4
39	4
40	0
41	1
42	2
43	2
44	4
45	5
46	4
47	5
48	0
49	1
50	2
51	3
52	4
53	4
54	6
55	6
56	0
57	1
58	2
59	3
60	4
61	5
62	6
63	7
64	0
65	1
66	2
67	2
68	4
69	4
70	4
71	4
72	0
73	1
74	2
75	2
76	4
77	4
78	4
79	4
80	0
81	1
82	2
83	2
84	4
85	5
86	4

[0, 0, 0, 1, 0, 1, 0, 1, 0, 1, 2, 2, 0, 1, 2, 3, 0, 1, 2, 2, 0, 1, 2, 2, 0, 1, 2, 3, 0, 1, 2, 3, 0, 1, 2, 2, 4, 4, 4, 4, 0, 1, 2, 2, 4, 5, 4, 5, 0, 1, 2, 3, 4, 4, 6, 6, 0, 1, 2, 3, 4, 5, 6, 7, 0, 1, 2, 2, 4, 4, 4, 4, 0, 1, 2, 2, 4, 4, 4, 4, 0, 1, 2, 2, 4, 5, 4]

cp's OEIS Frontend

A327188 For any n >= 0: consider the different ways to split the binary representation of n into two (possibly empty) parts, say with value x and y; a(n) is the greatest possible value of x AND y (where AND denotes the bitwise AND operator).

Table of values

List of values

n	a(n)
0	0
1	0
2	0
3	1
4	0
5	1
6	0
7	1
8	0
9	1
10	2
11	2
12	0
13	1
14	2
15	3
16	0
17	1
18	2
19	2
20	0
21	1
22	2
23	2
24	0
25	1
26	2
27	3
28	0
29	1
30	2
31	3
32	0
33	1
34	2
35	2
36	4
37	4
38	4
39	4
40	0
41	1
42	2
43	2
44	4
45	5
46	4
47	5
48	0
49	1
50	2
51	3
52	4
53	4
54	6
55	6
56	0
57	1
58	2
59	3
60	4
61	5
62	6
63	7
64	0
65	1
66	2
67	2
68	4
69	4
70	4
71	4
72	0
73	1
74	2
75	2
76	4
77	4
78	4
79	4
80	0
81	1
82	2
83	2
84	4
85	5
86	4

n	a(n)
0	0
1	0
2	0
3	1
4	0
5	1
6	0
7	1
8	0
9	1
10	2
11	2
12	0
13	1
14	2
15	3
16	0
17	1
18	2
19	2
20	0
21	1
22	2
23	2
24	0
25	1
26	2
27	3
28	0
29	1
30	2
31	3
32	0
33	1
34	2
35	2
36	4
37	4
38	4
39	4
40	0
41	1
42	2
43	2
44	4
45	5
46	4
47	5
48	0
49	1
50	2
51	3
52	4
53	4
54	6
55	6
56	0
57	1
58	2
59	3
60	4
61	5
62	6
63	7
64	0
65	1
66	2
67	2
68	4
69	4
70	4
71	4
72	0
73	1
74	2
75	2
76	4
77	4
78	4
79	4
80	0
81	1
82	2
83	2
84	4
85	5
86	4

n	a(n)
0	0
1	0
2	0
3	1
4	0
5	1
6	0
7	1
8	0
9	1
10	2
11	2
12	0
13	1
14	2
15	3
16	0
17	1
18	2
19	2
20	0
21	1
22	2
23	2
24	0
25	1
26	2
27	3
28	0
29	1
30	2
31	3
32	0
33	1
34	2
35	2
36	4
37	4
38	4
39	4
40	0
41	1
42	2
43	2
44	4
45	5
46	4
47	5
48	0
49	1
50	2
51	3
52	4
53	4
54	6
55	6
56	0
57	1
58	2
59	3
60	4
61	5
62	6
63	7
64	0
65	1
66	2
67	2
68	4
69	4
70	4
71	4
72	0
73	1
74	2
75	2
76	4
77	4
78	4
79	4
80	0
81	1
82	2
83	2
84	4
85	5
86	4