A371459 - cp's OEIS frontend

A371459 For any positive integer with binary digits (b_1, ..., b_w) (where b_1 = 1), the binary digits of a(n), possibly with leading zeros, are (b_2, b_4, ..., b_{floor(w/2) * 2}); a(0) = 0.

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

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

cp's OEIS Frontend

A371459 For any positive integer with binary digits (b_1, ..., b_w) (where b_1 = 1), the binary digits of a(n), possibly with leading zeros, are (b_2, b_4, ..., b_{floor(w/2) * 2}); a(0) = 0.

Table of values

List of values

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

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

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