A236288 - cp's OEIS frontend

A236288 a(n) = sigma(n)^n / sigma(n)^tau(n), where tau(n) = A000005(n) = the number of divisors of n and sigma(n) = A000203(n) = the sum of divisors of n.

n	a(n)
1	1
2	1
3	4
4	7
5	216
6	144
7	32768
8	50625
9	4826809
10	34012224
11	5159780352
12	481890304
13	4049565169664
14	63403380965376
15	1521681143169024
16	25408476896404831
17	6746640616477458432
18	12381557655576425121
19	13107200000000000000000
20	53148384174432398229504
21	38685626227668133590597632

[1, 1, 4, 7, 216, 144, 32768, 50625, 4826809, 34012224, 5159780352, 481890304, 4049565169664, 63403380965376, 1521681143169024, 25408476896404831, 6746640616477458432, 12381557655576425121, 13107200000000000000000, 53148384174432398229504, 38685626227668133590597632]

cp's OEIS Frontend

A236288 a(n) = sigma(n)^n / sigma(n)^tau(n), where tau(n) = A000005(n) = the number of divisors of n and sigma(n) = A000203(n) = the sum of divisors of n.

Table of values

List of values