A371907 - cp's OEIS frontend

A371907 a(n) = sum of 2^(k-1) such that floor(n/prime(k)) is even.

n	a(n)
1	0
2	0
3	0
4	1
5	1
6	2
7	2
8	3
9	1
10	4
11	4
12	7
13	7
14	14
15	8
16	9
17	9
18	10
19	10
20	15
21	5
22	20
23	20
24	23
25	19
26	50
27	48
28	57
29	57
30	62
31	62
32	63
33	45
34	108
35	96
36	99
37	99
38	226
39	192
40	197
41	197
42	206
43	206
44	223
45	217
46	472
47	472
48	475
49	467
50	470
51	404
52	437
53	437
54	438
55	418
56	427
57	297
58	808
59	808
60	815
61	815
62	1838
63	1828

[0, 0, 0, 1, 1, 2, 2, 3, 1, 4, 4, 7, 7, 14, 8, 9, 9, 10, 10, 15, 5, 20, 20, 23, 19, 50, 48, 57, 57, 62, 62, 63, 45, 108, 96, 99, 99, 226, 192, 197, 197, 206, 206, 223, 217, 472, 472, 475, 467, 470, 404, 437, 437, 438, 418, 427, 297, 808, 808, 815, 815, 1838, 1828]

cp's OEIS Frontend

A371907 a(n) = sum of 2^(k-1) such that floor(n/prime(k)) is even.

Table of values

List of values