On a variant of Giuga numbers

Authors
Grau, José María Luca, Florian
Citation
Grau, José María et Luca, Florian, On a variant of Giuga numbers, Acta mathematica Sinica. English series (Print) , 28(4), 2012, pp. 653-660
Journal title
Acta mathematica Sinica. English series (Print) → ACNP
ISSN journal
14398516
Volume
28
Issue
4
Year of publication
2012
Pages
653 - 660
Database
ACNP
SICI code
Abstract
In this paper, we characterize the odd positive integers n satisfying the congruence .n.1j=1jn.12.0(modn). We show that the set of such positive integers has an asymptotic density which turns out to be slightly larger than 3/8.