A279702 - cp's OEIS frontend

A279702 a(n) = floor( exp(gamma) k log log k ) - sigma(k), where gamma is Euler's constant (A001620) and sigma(k) is sum of divisors of k (A000203), the n-th colossally abundant number (A004490).

n	a(n)
2	-5
3	-6
4	-9
5	-18
6	-26
7	-34
8	-123
9	-107
10	3953
11	90021
12	203866
13	678250
14	3860926
15	62168609
16	1022130830
17	22777519100
18	46323907000
19	1499885420000
20	47625567000000
21	318447820000000
22	974228630000000
23	36070436000000000

[-5, -6, -9, -18, -26, -34, -123, -107, 3953, 90021, 203866, 678250, 3860926, 62168609, 1022130830, 22777519100, 46323907000, 1499885420000, 47625567000000, 318447820000000, 974228630000000, 36070436000000000]

cp's OEIS Frontend

A279702 a(n) = floor( exp(gamma) k log log k ) - sigma(k), where gamma is Euler's constant (A001620) and sigma(k) is sum of divisors of k (A000203), the n-th colossally abundant number (A004490).

Table of values

List of values