A378659 - cp's OEIS frontend

A378659 Positions of records for ratio A003961(n)/sigma(n), where A003961 is fully multiplicative with a(p) = nextprime(p) and sigma is the sum of the divisors function.

n	a(n)
1	1
2	3
3	4
4	7
5	8
6	9
7	16
8	27
9	32
10	64
11	128
12	243
13	256
14	512
15	1024
16	2048
17	4096
18	8192
19	16384
20	32768
21	65536
22	131072
23	262144
24	524288
25	1048576
26	2097152
27	4194304
28	8388608
29	16777216
30	33554432
31	67108864

[1, 3, 4, 7, 8, 9, 16, 27, 32, 64, 128, 243, 256, 512, 1024, 2048, 4096, 8192, 16384, 32768, 65536, 131072, 262144, 524288, 1048576, 2097152, 4194304, 8388608, 16777216, 33554432, 67108864]

cp's OEIS Frontend

A378659 Positions of records for ratio A003961(n)/sigma(n), where A003961 is fully multiplicative with a(p) = nextprime(p) and sigma is the sum of the divisors function.

Table of values

List of values