OFFSET
1,2
LINKS
Jakob Zimmermann, Counting quasi-idempotent irreducible integral matrices, arXiv:1701.03699 [math.CO], 2017.
CROSSREFS
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Jan 20 2017
EXTENSIONS
Definition corrected by N. J. A. Sloane, Jan 23 2017 at the suggestion of Jakob Zimmermann
STATUS
approved