A371906 - cp's OEIS frontend

A371906 a(n) = sum of 2^(k-1) such that floor(n/prime(k)) is odd.

n	a(n)
1	0
2	1
3	3
4	2
5	6
6	5
7	13
8	12
9	14
10	11
11	27
12	24
13	56
14	49
15	55
16	54
17	118
18	117
19	245
20	240
21	250
22	235
23	491
24	488
25	492
26	461
27	463
28	454
29	966
30	961
31	1985
32	1984
33	2002
34	1939
35	1951
36	1948
37	3996
38	3869
39	3903
40	3898
41	7994
42	7985
43	16177
44	16160
45	16166
46	15911
47	32295
48	32292
49	32300
50	32297
51	32363

[0, 1, 3, 2, 6, 5, 13, 12, 14, 11, 27, 24, 56, 49, 55, 54, 118, 117, 245, 240, 250, 235, 491, 488, 492, 461, 463, 454, 966, 961, 1985, 1984, 2002, 1939, 1951, 1948, 3996, 3869, 3903, 3898, 7994, 7985, 16177, 16160, 16166, 15911, 32295, 32292, 32300, 32297, 32363]

cp's OEIS Frontend

A371906 a(n) = sum of 2^(k-1) such that floor(n/prime(k)) is odd.

Table of values

List of values