A245392 - cp's OEIS frontend

A245392 Sum_{k, k|n} 2^(k-1) + Sum_{1<=k<=n, gcd(k,n)=1} 2^(k-1).

n	a(n)
1	2
2	4
3	8
4	16
5	32
6	56
7	128
8	224
9	480
10	856
11	2048
12	3200
13	8192
14	13656
15	29920
16	54752
17	131072
18	202104
19	524288
20	857952
21	1939168
22	3495256
23	8388608
24	12918016
25	33013248
26	55924056
27	124631008
28	222655840
29	536870912
30	809850488
31	2147483648
32	3579172320
33	7974270688
34	14316557656

[2, 4, 8, 16, 32, 56, 128, 224, 480, 856, 2048, 3200, 8192, 13656, 29920, 54752, 131072, 202104, 524288, 857952, 1939168, 3495256, 8388608, 12918016, 33013248, 55924056, 124631008, 222655840, 536870912, 809850488, 2147483648, 3579172320, 7974270688, 14316557656]

cp's OEIS Frontend

A245392 Sum_{k, k|n} 2^(k-1) + Sum_{1<=k<=n, gcd(k,n)=1} 2^(k-1).

Table of values

List of values