A244325 a(n) = floor(antisigma(n) / n), where antisigma(n) = A024816(n) = the sum of the non-divisors of n that are between 1 and n.

0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13, 14, 14, 15, 15, 16, 15, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 21, 23, 23, 24, 24, 25, 25, 26, 26, 27, 27, 28, 27, 29, 29, 30, 30, 31, 31, 32, 32, 33, 33, 34

Offset: 1

Author

Jaroslav Krizek, Jun 25 2014

Keywords

• nonn
• easy

Comments

a(36) is first term such that a(n) < a(n-1) - see A244326.

Examples

			For n=10: a(10) = floor(antisigma(10)/10) = floor(37/10) = 3.
		

Links

• Jaroslav Krizek, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A024816, A244324, A244326.

Programs

Magma

[Floor((n*(n+1)div 2-SumOfDivisors(n))div n): n in [1..1000]];