A048675 - cp's OEIS frontend

A048675 If n = p_i^e_i * ... * p_k^e_k, p_i < ... < p_k primes (with p_i = prime(i)), then a(n) = (1/2) * (e_i * 2^i + ... + e_k * 2^k).

n	a(n)
1	0
2	1
3	2
4	2
5	4
6	3
7	8
8	3
9	4
10	5
11	16
12	4
13	32
14	9
15	6
16	4
17	64
18	5
19	128
20	6
21	10
22	17
23	256
24	5
25	8
26	33
27	6
28	10
29	512
30	7
31	1024
32	5
33	18
34	65
35	12
36	6
37	2048
38	129
39	34
40	7
41	4096
42	11
43	8192
44	18
45	8
46	257
47	16384
48	6
49	16
50	9
51	66
52	34
53	32768
54	7
55	20
56	11
57	130
58	513
59	65536
60	8
61	131072
62	1025
63	12
64	6
65	36
66	19

[0, 1, 2, 2, 4, 3, 8, 3, 4, 5, 16, 4, 32, 9, 6, 4, 64, 5, 128, 6, 10, 17, 256, 5, 8, 33, 6, 10, 512, 7, 1024, 5, 18, 65, 12, 6, 2048, 129, 34, 7, 4096, 11, 8192, 18, 8, 257, 16384, 6, 16, 9, 66, 34, 32768, 7, 20, 11, 130, 513, 65536, 8, 131072, 1025, 12, 6, 36, 19]

cp's OEIS Frontend

A048675 If n = p_i^e_i * ... * p_k^e_k, p_i < ... < p_k primes (with p_i = prime(i)), then a(n) = (1/2) * (e_i * 2^i + ... + e_k * 2^k).

Table of values

List of values