A139353 - cp's OEIS frontend

A139353 Let the binary expansion of n be n = Sum_{k} 2^{r_k}, let e(n) be the number of r_k's that are even, o(n) the number that are odd; sequence gives e(n)*o(n).

n	a(n)
0	0
1	0
2	0
3	1
4	0
5	0
6	1
7	2
8	0
9	1
10	0
11	2
12	1
13	2
14	2
15	4
16	0
17	0
18	1
19	2
20	0
21	0
22	2
23	3
24	1
25	2
26	2
27	4
28	2
29	3
30	4
31	6
32	0
33	1
34	0
35	2
36	1
37	2
38	2
39	4
40	0
41	2
42	0
43	3
44	2
45	4
46	3
47	6
48	1
49	2
50	2
51	4
52	2
53	3
54	4
55	6
56	2
57	4
58	3
59	6
60	4
61	6
62	6
63	9
64	0
65	0
66	1
67	2
68	0
69	0
70	2
71	3
72	1
73	2
74	2
75	4
76	2
77	3
78	4
79	6
80	0
81	0
82	2
83	3
84	0
85	0
86	3
87	4
88	2
89	3
90	4
91	6
92	3
93	4
94	6
95	8
96	1
97	2
98	2

[0, 0, 0, 1, 0, 0, 1, 2, 0, 1, 0, 2, 1, 2, 2, 4, 0, 0, 1, 2, 0, 0, 2, 3, 1, 2, 2, 4, 2, 3, 4, 6, 0, 1, 0, 2, 1, 2, 2, 4, 0, 2, 0, 3, 2, 4, 3, 6, 1, 2, 2, 4, 2, 3, 4, 6, 2, 4, 3, 6, 4, 6, 6, 9, 0, 0, 1, 2, 0, 0, 2, 3, 1, 2, 2, 4, 2, 3, 4, 6, 0, 0, 2, 3, 0, 0, 3, 4, 2, 3, 4, 6, 3, 4, 6, 8, 1, 2, 2]

cp's OEIS Frontend

A139353 Let the binary expansion of n be n = Sum_{k} 2^{r_k}, let e(n) be the number of r_k's that are even, o(n) the number that are odd; sequence gives e(n)*o(n).

Table of values

List of values

n	a(n)
0	0
1	0
2	0
3	1
4	0
5	0
6	1
7	2
8	0
9	1
10	0
11	2
12	1
13	2
14	2
15	4
16	0
17	0
18	1
19	2
20	0
21	0
22	2
23	3
24	1
25	2
26	2
27	4
28	2
29	3
30	4
31	6
32	0
33	1
34	0
35	2
36	1
37	2
38	2
39	4
40	0
41	2
42	0
43	3
44	2
45	4
46	3
47	6
48	1
49	2
50	2
51	4
52	2
53	3
54	4
55	6
56	2
57	4
58	3
59	6
60	4
61	6
62	6
63	9
64	0
65	0
66	1
67	2
68	0
69	0
70	2
71	3
72	1
73	2
74	2
75	4
76	2
77	3
78	4
79	6
80	0
81	0
82	2
83	3
84	0
85	0
86	3
87	4
88	2
89	3
90	4
91	6
92	3
93	4
94	6
95	8
96	1
97	2
98	2

n	a(n)
0	0
1	0
2	0
3	1
4	0
5	0
6	1
7	2
8	0
9	1
10	0
11	2
12	1
13	2
14	2
15	4
16	0
17	0
18	1
19	2
20	0
21	0
22	2
23	3
24	1
25	2
26	2
27	4
28	2
29	3
30	4
31	6
32	0
33	1
34	0
35	2
36	1
37	2
38	2
39	4
40	0
41	2
42	0
43	3
44	2
45	4
46	3
47	6
48	1
49	2
50	2
51	4
52	2
53	3
54	4
55	6
56	2
57	4
58	3
59	6
60	4
61	6
62	6
63	9
64	0
65	0
66	1
67	2
68	0
69	0
70	2
71	3
72	1
73	2
74	2
75	4
76	2
77	3
78	4
79	6
80	0
81	0
82	2
83	3
84	0
85	0
86	3
87	4
88	2
89	3
90	4
91	6
92	3
93	4
94	6
95	8
96	1
97	2
98	2

n	a(n)
0	0
1	0
2	0
3	1
4	0
5	0
6	1
7	2
8	0
9	1
10	0
11	2
12	1
13	2
14	2
15	4
16	0
17	0
18	1
19	2
20	0
21	0
22	2
23	3
24	1
25	2
26	2
27	4
28	2
29	3
30	4
31	6
32	0
33	1
34	0
35	2
36	1
37	2
38	2
39	4
40	0
41	2
42	0
43	3
44	2
45	4
46	3
47	6
48	1
49	2
50	2
51	4
52	2
53	3
54	4
55	6
56	2
57	4
58	3
59	6
60	4
61	6
62	6
63	9
64	0
65	0
66	1
67	2
68	0
69	0
70	2
71	3
72	1
73	2
74	2
75	4
76	2
77	3
78	4
79	6
80	0
81	0
82	2
83	3
84	0
85	0
86	3
87	4
88	2
89	3
90	4
91	6
92	3
93	4
94	6
95	8
96	1
97	2
98	2