A343650 - cp's OEIS frontend

A343650 a(n) is the number of divisors d of n such that the product d * (n/d) can be computed without carries in binary.

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

[1, 2, 2, 3, 2, 4, 2, 4, 2, 4, 2, 6, 2, 4, 4, 5, 2, 4, 2, 6, 2, 4, 2, 8, 2, 4, 4, 6, 2, 8, 2, 6, 2, 4, 2, 6, 2, 4, 2, 8, 2, 4, 2, 6, 4, 4, 2, 10, 2, 4, 4, 6, 2, 8, 2, 8, 2, 4, 2, 12, 2, 4, 6, 7, 2, 4, 2, 6, 2, 4, 2, 8, 2, 4, 2, 6, 2, 4, 2, 10, 2, 4, 2, 6, 4, 4]

cp's OEIS Frontend

A343650 a(n) is the number of divisors d of n such that the product d * (n/d) can be computed without carries in binary.

Table of values

List of values

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

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

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